diff --git a/Day2/.DS_Store b/Day2/.DS_Store
new file mode 100644
index 00000000..5008ddfc
Binary files /dev/null and b/Day2/.DS_Store differ
diff --git a/Day2/intro-flask/.DS_Store b/Day2/intro-flask/.DS_Store
new file mode 100644
index 00000000..0ed7ce6c
Binary files /dev/null and b/Day2/intro-flask/.DS_Store differ
diff --git a/Day2/intro-flask/data/listings.db b/Day2/intro-flask/data/listings.db
new file mode 100644
index 00000000..46198ab3
Binary files /dev/null and b/Day2/intro-flask/data/listings.db differ
diff --git a/Day2/intro-flask/models/listing.py b/Day2/intro-flask/models/listing.py
new file mode 100644
index 00000000..af1fa310
--- /dev/null
+++ b/Day2/intro-flask/models/listing.py
@@ -0,0 +1,56 @@
+import sqlite3
+
+class Listing:
+
+    tablename = "listings"
+    dbpath = "..data/listings.db"
+
+    def __init__(self, name, quantity, price, location, pk=None):
+        self.pk = pk
+        self.name = name
+        self.quantity = quantity
+        self.price = price
+        self.location = location
+
+
+    def insert(self):
+        with sqlite3.connect(self.dbpath) as conn:
+            cursor = conn.cursor()
+            cursor.execute("INSERT INTO listing VALUES(name, quantity, price, location)")
+            
+
+    def update(self):
+        with sqlite3.connect(self.dbpath) as conn:
+            cursor = conn.cursor()
+            cursor.execute("""UPDATE listing SET name = self.name WHERE pk = self.pk""")
+            
+
+    def delete(self):
+        pass
+
+
+    @classmethod
+    def select_all(cls):
+        with sqlite3.connect(cls.dbpath) as conn:
+            cursor = conn.cursor()
+            # TODO: prevent sql injection
+            sql = f"""SELECT * from {cls.tablename}"""
+            cursor.execute(sql)
+            return cursor.fetchall()
+
+
+    @classmethod
+    def select_one(cls):
+        with sqlite3.connect(cls.dbpath) as conn:
+            cursor = conn.cursor()
+            # TODO: prevent sql injection
+            sql = f"""SELECT * from {cls.tablename}"""
+            cursor.execute(sql)
+            return cursor.fetchone()
+
+
+if __name__ == "__main__":
+    listings = Listing.select_all()
+    print(listings)
+    new_item = Listing("name", 5, 12.99, "test location")
+    new_item.insert()
\ No newline at end of file
diff --git a/Day2/run.py b/Day2/run.py
new file mode 100644
index 00000000..03ca92f2
--- /dev/null
+++ b/Day2/run.py
@@ -0,0 +1,7 @@
+import os
+from models.listing import Listing
+
+PATH = os.path.dirname(__file__)
+Listing.dbpath = os.path.join(PATH, "data", "listings.db")
+
+print(Listing.select_all())
diff --git a/introduction_and_environment/data_types_and_control_flow/1_compare_check/Solution/solution.py b/introduction_and_environment/data_types_and_control_flow/1_compare_check/Solution/solution.py
deleted file mode 100644
index ade03179..00000000
--- a/introduction_and_environment/data_types_and_control_flow/1_compare_check/Solution/solution.py
+++ /dev/null
@@ -1 +0,0 @@
-# Code your solution here
diff --git a/introduction_and_environment/git/creating_a_repository/solution/solution.py b/introduction_and_environment/git/creating_a_repository/solution/solution.py
index 3f6cd7a5..0d25a160 100644
--- a/introduction_and_environment/git/creating_a_repository/solution/solution.py
+++ b/introduction_and_environment/git/creating_a_repository/solution/solution.py
@@ -1,2 +1,2 @@
 # Code your solution here
-
+answer = 'a'
\ No newline at end of file
diff --git a/introduction_and_environment/git/remote_repository/solution/solution.py b/introduction_and_environment/git/remote_repository/solution/solution.py
index 3f6cd7a5..482a5499 100644
--- a/introduction_and_environment/git/remote_repository/solution/solution.py
+++ b/introduction_and_environment/git/remote_repository/solution/solution.py
@@ -1,2 +1,2 @@
 # Code your solution here
-
+answer = 'd'
diff --git a/introduction_and_environment/git/staging_area/solution/solution.py b/introduction_and_environment/git/staging_area/solution/solution.py
index 3f6cd7a5..b8eb8f57 100644
--- a/introduction_and_environment/git/staging_area/solution/solution.py
+++ b/introduction_and_environment/git/staging_area/solution/solution.py
@@ -1,2 +1,2 @@
 # Code your solution here
-
+answer = 'c'
diff --git a/introduction_and_environment/git/update_code/solution/solution.py b/introduction_and_environment/git/update_code/solution/solution.py
index f8c333fa..37b0a8ca 100644
--- a/introduction_and_environment/git/update_code/solution/solution.py
+++ b/introduction_and_environment/git/update_code/solution/solution.py
@@ -1 +1,2 @@
-# Code your solution here
\ No newline at end of file
+# Code your solution here
+answer = 'b'
\ No newline at end of file
diff --git a/introduction_and_environment/unix_and_bash/basic_commands/solution/solution.py b/introduction_and_environment/unix_and_bash/basic_commands/solution/solution.py
index efee9b73..c6c6d683 100644
--- a/introduction_and_environment/unix_and_bash/basic_commands/solution/solution.py
+++ b/introduction_and_environment/unix_and_bash/basic_commands/solution/solution.py
@@ -2,9 +2,10 @@
 ONE = 'man'
 
 # Assign the correct strings below
-TWO = 
-THREE = 
-FOUR = 
-FIVE = 
-SIX = 
-SEVEN = 
+TWO = 'ls'
+THREE = 'mkdir'
+FOUR = 'touch'
+FIVE = 'cp'
+SIX = 'mv'
+SEVEN = 'rm'
+
diff --git a/introduction_and_environment/unix_and_bash/commands_with_options/solution/solution.py b/introduction_and_environment/unix_and_bash/commands_with_options/solution/solution.py
index f7e60d14..5109eeca 100644
--- a/introduction_and_environment/unix_and_bash/commands_with_options/solution/solution.py
+++ b/introduction_and_environment/unix_and_bash/commands_with_options/solution/solution.py
@@ -1,9 +1,9 @@
 # Assign the correct strings below
 
-ONE = 
-TWO = 
-THREE = 
-FOUR = 
-FIVE = 
-SIX = 
-SEVEN = 
+ONE = 'cd exercises'
+TWO = 'pwd'
+THREE = 'cat textfile.txt'
+FOUR = 'tail textfile.txt'
+FIVE = 'ls -a'
+SIX = 'head textfile.txt'
+SEVEN = 'cp stackdata.json stockdata.json'
diff --git a/introduction_and_environment/unix_and_bash/commands_with_options_2/solution/solution.py b/introduction_and_environment/unix_and_bash/commands_with_options_2/solution/solution.py
index 8f4c1217..8ec23b4d 100644
--- a/introduction_and_environment/unix_and_bash/commands_with_options_2/solution/solution.py
+++ b/introduction_and_environment/unix_and_bash/commands_with_options_2/solution/solution.py
@@ -1,8 +1,8 @@
 # Assign the correct strings below
 
-ONE = 
-TWO = 
-THREE = 
-FOUR = 
-FIVE = 
-SIX = 
+ONE = 'grep elephant book.txt'
+TWO = 'mv notes.txt newdir'
+THREE = 'grep -r string testdir'
+FOUR = 'rm -d empty'
+FIVE = 'cd'
+SIX =  'rm -r Downloads'
diff --git a/introduction_and_environment/unix_and_bash/intermediate_commands/solution/solution.py b/introduction_and_environment/unix_and_bash/intermediate_commands/solution/solution.py
index 1b20d256..30e1f6f9 100644
--- a/introduction_and_environment/unix_and_bash/intermediate_commands/solution/solution.py
+++ b/introduction_and_environment/unix_and_bash/intermediate_commands/solution/solution.py
@@ -1,7 +1,7 @@
 
 # Assign the correct strings below
-ONE = 
-TWO = 
-THREE = 
-FOUR = 
-FIVE = 
+ONE = 'mkdir testdir && cd testdir'
+TWO = 'cat textfile.txt | grep and'
+THREE = 'ls >> contents.txt'
+FOUR = 'cd current || mkdir current'
+FIVE = 'pwd > current_path.txt'
diff --git a/introduction_to_python/class_protocols/1_a_vector_class_constructor/solution/solution.py b/introduction_to_python/class_protocols/1_a_vector_class_constructor/solution/solution.py
index e69de29b..5f6c8267 100644
--- a/introduction_to_python/class_protocols/1_a_vector_class_constructor/solution/solution.py
+++ b/introduction_to_python/class_protocols/1_a_vector_class_constructor/solution/solution.py
@@ -0,0 +1,9 @@
+class Vector3D:
+
+    def __init__(self, x=0, y=0, z=0):
+        self.x = x
+        self.y = y
+        self.z = z
+
+
+vector1 = Vector3D(1, 2, 3)
diff --git a/introduction_to_python/class_protocols/1_b_print_vector/solution/solution.py b/introduction_to_python/class_protocols/1_b_print_vector/solution/solution.py
index e69de29b..d599d260 100644
--- a/introduction_to_python/class_protocols/1_b_print_vector/solution/solution.py
+++ b/introduction_to_python/class_protocols/1_b_print_vector/solution/solution.py
@@ -0,0 +1,13 @@
+class Vector3D:
+
+    def __init__(self, x=0, y=0, z=0):
+        self.x = x
+        self.y = y
+        self.z = z
+
+    def __str__(self):
+        return f'x = {self.x}, y = {self.y}, z = {self.z}'
+
+
+vector1 = Vector3D(3, 4, 2)
+print(vector1)
diff --git a/introduction_to_python/class_protocols/2_a_add_vectors/solution/solution.py b/introduction_to_python/class_protocols/2_a_add_vectors/solution/solution.py
index e69de29b..833e094b 100644
--- a/introduction_to_python/class_protocols/2_a_add_vectors/solution/solution.py
+++ b/introduction_to_python/class_protocols/2_a_add_vectors/solution/solution.py
@@ -0,0 +1,12 @@
+class Vector3D:
+
+    def __init__(self, x=0, y=0, z=0):
+        self.x = x
+        self.y = y
+        self.z = z
+
+    def __add__(self, other):
+        x = self.x + other.x
+        y = self.y + other.y
+        z = self.z + other.z
+        return Vector3D(x, y, z)
diff --git a/introduction_to_python/class_protocols/2_a_comparison_lt_gt/solution/solution.py b/introduction_to_python/class_protocols/2_a_comparison_lt_gt/solution/solution.py
index e69de29b..76b85155 100644
--- a/introduction_to_python/class_protocols/2_a_comparison_lt_gt/solution/solution.py
+++ b/introduction_to_python/class_protocols/2_a_comparison_lt_gt/solution/solution.py
@@ -0,0 +1,31 @@
+import math
+
+
+class Vector3D:
+    def __init__(self, x=0, y=0, z=0):
+        self.x = x
+        self.y = y
+        self.z = z
+
+    def __it__(self, other):
+        if self.x < other.x:
+            return math.sqrt(x)
+        elif self.y < other.y:
+            return True
+        else:
+            self.z < other.z
+            return True
+
+    def __gt__(self, other):
+        if self.x > other.x:
+            return True
+        elif self.y > other.y:
+            return True
+        else:
+            self.z > other.z
+            return True
+
+
+print(vec1=math.sqrt((1, 5, 3)))
+print(vec2=math.sqrt((4, 4, 1)))
+print(vec3=math.sqrt((1, 5, 2)))
diff --git a/introduction_to_python/classes/1_a_employee_class/solution/solution.py b/introduction_to_python/classes/1_a_employee_class/solution/solution.py
index e69de29b..8500ad83 100644
--- a/introduction_to_python/classes/1_a_employee_class/solution/solution.py
+++ b/introduction_to_python/classes/1_a_employee_class/solution/solution.py
@@ -0,0 +1,10 @@
+class Employee:
+
+    def __init__(self, name, employee_id, salary, years_at_company):
+        self.name = name
+        self.employee_id = employee_id
+        self.salary = salary
+        self.years_at_company = years_at_company
+
+
+cosette = Employee("Cosette Rodger", 1, 100000, 4)
diff --git a/introduction_to_python/classes/1_b_employee_raise/solution/solution.py b/introduction_to_python/classes/1_b_employee_raise/solution/solution.py
index e69de29b..bdb221b7 100644
--- a/introduction_to_python/classes/1_b_employee_raise/solution/solution.py
+++ b/introduction_to_python/classes/1_b_employee_raise/solution/solution.py
@@ -0,0 +1,18 @@
+class Employee:
+
+    def __init__(self, name, employee_id, salary, years_at_company):
+        self.name = name
+        self.employee_id = employee_id
+        self.salary = salary
+        self.years_at_company = years_at_company
+
+
+def give_raises(employee_lst):
+    for emp in employee_lst:
+        if emp.years_at_company <= 5:
+            emp.salary = emp.salary + 5000
+        elif emp.years_at_company > 5 and emp.years_at_company < 10:
+            emp.salary = emp.salary + 8000
+        else:
+            emp.years_at_company >= 10
+            emp.salary = emp.salary + 10000
diff --git a/introduction_to_python/classes/1_c_employee_sort/solution/solution.py b/introduction_to_python/classes/1_c_employee_sort/solution/solution.py
index e69de29b..041c3949 100644
--- a/introduction_to_python/classes/1_c_employee_sort/solution/solution.py
+++ b/introduction_to_python/classes/1_c_employee_sort/solution/solution.py
@@ -0,0 +1,14 @@
+class Employee:
+
+    def __init__(self, name, employee_id, salary, years_at_company):
+        self.name = name
+        self.employee_id = employee_id
+        self.salary = salary
+        self.years_at_company = years_at_company
+
+
+def sort_employees(employee_list):
+    names = []
+    for employee in employee_list:
+        names.append(employee.name)
+    return sorted(names)
diff --git a/introduction_to_python/classes/2_a_person_child/solution/solution.py b/introduction_to_python/classes/2_a_person_child/solution/solution.py
index e69de29b..5756f1ee 100644
--- a/introduction_to_python/classes/2_a_person_child/solution/solution.py
+++ b/introduction_to_python/classes/2_a_person_child/solution/solution.py
@@ -0,0 +1,25 @@
+class Person:
+
+    def __init__(self, name, age, spouse, children):
+        self.name = name
+        self.age = age
+        self.spouse = spouse
+        self.children = children
+
+
+class Child(Person):
+    def __init__(self, name, age, spouse, children, parents):
+        Person.__init__(self, name, age, spouse, children)
+        self.parents = parents
+
+
+jim = Person('Jim Brown', 45, None, [])
+suzy = Person('Suzy Brown', 42, None, [])
+martha = Child('Martha Brown', 18, None, [], [])
+
+jim.spouse = suzy
+suzy.spouse = jim
+jim.children.append(martha)
+suzy.children.append(martha)
+martha.parents.append(jim)
+martha.parents.append(suzy)
diff --git a/introduction_to_python/classes/2_b_person_get_sibilings/solution/solution.py b/introduction_to_python/classes/2_b_person_get_sibilings/solution/solution.py
index e69de29b..ce3fe1fc 100644
--- a/introduction_to_python/classes/2_b_person_get_sibilings/solution/solution.py
+++ b/introduction_to_python/classes/2_b_person_get_sibilings/solution/solution.py
@@ -0,0 +1,20 @@
+class Person:
+
+    def __init__(self, name, age, spouse, children):
+        self.name = name
+        self.age = age
+        self.spouse = spouse
+        self.children = children
+
+
+class Child(Person):
+
+    def __init__(self, name, age, spouse, children, parents):
+        Person.__init__(self, name, age, spouse, children)
+        self.parents = parents
+
+    def get_siblings(self, children):
+        self.child_by_age = []
+        children.sort(key=self.child_by_age)
+        for self.child in children:
+            return self.children.age
diff --git a/introduction_to_python/functions/1_below_100/solution/solution.py b/introduction_to_python/functions/1_below_100/solution/solution.py
index aeb50baa..73d0b751 100644
--- a/introduction_to_python/functions/1_below_100/solution/solution.py
+++ b/introduction_to_python/functions/1_below_100/solution/solution.py
@@ -1 +1,11 @@
 # Write your solution here
+
+num = int()
+def below_100(num):
+    if num < 100:
+        return("less than 100")
+    else:
+        return("greater than 100")
+    
+below_100(50)
+below_100(200)
diff --git a/introduction_to_python/functions/1_concat_args/solution/solution.py b/introduction_to_python/functions/1_concat_args/solution/solution.py
index e69de29b..531c39ba 100644
--- a/introduction_to_python/functions/1_concat_args/solution/solution.py
+++ b/introduction_to_python/functions/1_concat_args/solution/solution.py
@@ -0,0 +1,4 @@
+def concat_input(val_1, val_2):
+    return val_1 + val_2
+
+concat_input(val_1 = "hello", val_2 = "world")
diff --git a/introduction_to_python/functions/1_return_hello/solution/solution.py b/introduction_to_python/functions/1_return_hello/solution/solution.py
index e69de29b..bd33b9a6 100644
--- a/introduction_to_python/functions/1_return_hello/solution/solution.py
+++ b/introduction_to_python/functions/1_return_hello/solution/solution.py
@@ -0,0 +1,4 @@
+def hello(name):
+  return("Hello " + name)
+
+hello("Dorothy")
diff --git a/introduction_to_python/functions/2_max_value/solution/solution.py b/introduction_to_python/functions/2_max_value/solution/solution.py
index aeb50baa..a3e9b179 100644
--- a/introduction_to_python/functions/2_max_value/solution/solution.py
+++ b/introduction_to_python/functions/2_max_value/solution/solution.py
@@ -1 +1,6 @@
 # Write your solution here
+
+def max_val(a, b, c):
+    return max(a, b, c)
+    
+print(max_val(1, 4, 2))
diff --git a/introduction_to_python/functions/2_shut_down/solution/solution.py b/introduction_to_python/functions/2_shut_down/solution/solution.py
index e69de29b..10659820 100644
--- a/introduction_to_python/functions/2_shut_down/solution/solution.py
+++ b/introduction_to_python/functions/2_shut_down/solution/solution.py
@@ -0,0 +1,7 @@
+def shut_down(x):
+    if x == True:
+        return "SHUTDOWN"
+    else:
+        return "SHUTDOWN ABORTED"
+    
+#print(shut_down(x=0))
diff --git a/introduction_to_python/functions/2_variable_arguments/solution/solution.py b/introduction_to_python/functions/2_variable_arguments/solution/solution.py
index e69de29b..94fc36d3 100644
--- a/introduction_to_python/functions/2_variable_arguments/solution/solution.py
+++ b/introduction_to_python/functions/2_variable_arguments/solution/solution.py
@@ -0,0 +1,4 @@
+def concat_args(*args):
+    return "" + ""
+
+print(concat_args("Hello ", "There"))
diff --git a/introduction_to_python/functions/3_count_even/solution/solution.py b/introduction_to_python/functions/3_count_even/solution/solution.py
index e69de29b..46b10552 100644
--- a/introduction_to_python/functions/3_count_even/solution/solution.py
+++ b/introduction_to_python/functions/3_count_even/solution/solution.py
@@ -0,0 +1,6 @@
+def count_even(*args):
+    for num in args:
+        if num % 2 == 0:
+            return num 
+
+count_even(1, 2, 3, 4) == 2
diff --git a/introduction_to_python/functions/3_divisible_by_3/solution/solution.py b/introduction_to_python/functions/3_divisible_by_3/solution/solution.py
index fabb9be6..f6044fe0 100644
--- a/introduction_to_python/functions/3_divisible_by_3/solution/solution.py
+++ b/introduction_to_python/functions/3_divisible_by_3/solution/solution.py
@@ -1 +1,9 @@
 # Write your code here
+
+def divisible_by_3(*args):
+    div_3 = []
+    for num in args:
+        if num % 3 == 0:
+            return  div_3.append(num) 
+
+print(divisible_by_3(2,3,5,6,9))