diff --git a/src/cityreader/cityreader.py b/src/cityreader/cityreader.py
index 2bd8007ce7..dced9785d0 100644
--- a/src/cityreader/cityreader.py
+++ b/src/cityreader/cityreader.py
@@ -1,5 +1,15 @@
 # Create a class to hold a city location. Call the class "City". It should have
 # fields for name, lat and lon (representing latitude and longitude).
+import csv
+
+class City:
+  def __init__(self, name, lat, lon):
+    self.name = name
+    self.lat = lat
+    self.lon = lon
+
+  def __str__(self):
+    return f"{self.name}, {self.lat}, {self.lon}"  
 
 
 # We have a collection of US cities with population over 750,000 stored in the
@@ -21,7 +31,13 @@ def cityreader(cities=[]):
   # Ensure that the lat and lon valuse are all floats
   # For each city record, create a new City instance and add it to the 
   # `cities` list
-    
+  rows = []
+  with open("./src/cityreader/cities.csv") as csvfile:
+    reader = csv.reader(csvfile, delimiter = ",")
+    for row in reader:
+      rows.append(row)
+    for row in rows[1:]:
+      cities.append(City(row[0], float(row[3]), float(row[4])))
     return cities
 
 cityreader(cities)
diff --git a/src/comp/comp.py b/src/comp/comp.py
index 82f8821d63..5041cc9817 100644
--- a/src/comp/comp.py
+++ b/src/comp/comp.py
@@ -24,48 +24,48 @@ def __repr__(self):
 # Write a list comprehension that creates a list of names of everyone
 # whose name starts with 'D':
 print("Starts with D:")
-a = []
+a = [human.name for human in humans if human.name[0] == "D"]
 print(a)
 
 # Write a list comprehension that creates a list of names of everyone
 # whose name ends in "e".
 print("Ends with e:")
-b = []
+b = [human.name for human in humans if human.name[-1] == "e"]
 print(b)
 
 # Write a list comprehension that creates a list of names of everyone
 # whose name starts with any letter between 'C' and 'G' inclusive.
 print("Starts between C and G, inclusive:")
-c = []
+c = [human.name for human in humans if (human.name[0] >= "C") and (human.name[0] <= "G")]
 print(c)
 
 # Write a list comprehension that creates a list of all the ages plus 10.
 print("Ages plus 10:")
-d = []
+d = [human.age + 10 for human in humans]
 print(d)
 
 # Write a list comprehension that creates a list of strings which are the name
 # joined to the age with a hyphen, for example "David-31", for all humans.
 print("Name hyphen age:")
-e = []
+e = [f"{human.name}-{human.age}" for human in humans]
 print(e)
 
 # Write a list comprehension that creates a list of tuples containing name and
 # age, for example ("David", 31), for everyone between the ages of 27 and 32,
 # inclusive.
 print("Names and ages between 27 and 32:")
-f = []
+f = [(human.name, human.age) for human in humans if human.age >= 27 and human.age <= 32]
 print(f)
 
 # Write a list comprehension that creates a list of new Humans like the old
 # list, except with all the names uppercase and the ages with 5 added to them.
 # The "humans" list should be unmodified.
 print("All names uppercase:")
-g = []
+g = [Human(human.name.upper(), human.age + 5)for human in humans]
 print(g)
 
 # Write a list comprehension that contains the square root of all the ages.
 print("Square root of ages:")
 import math
-h = []
+h = [math.sqrt(human.age) for human in humans]
 print(h)
diff --git a/src/oop/oop1.py b/src/oop/oop1.py
index b7268c5263..1c3426e1ce 100644
--- a/src/oop/oop1.py
+++ b/src/oop/oop1.py
@@ -17,3 +17,23 @@
 #     pass
 #
 # Put a comment noting which class is the base class
+class Vehicle:
+    pass
+
+class FlightVehicle(Vehicle):
+    pass
+
+class Starship(FlightVehicle):
+    pass
+
+class Airplane(FlightVehicle):
+    pass
+
+class GroundVehicle(Vehicle):
+    pass
+
+class Car(GroundVehicle):
+    pass
+
+class Motorcycle(GroundVehicle):
+    pass                
\ No newline at end of file
diff --git a/src/oop/oop2.py b/src/oop/oop2.py
index 29d3e481fe..ef906973db 100644
--- a/src/oop/oop2.py
+++ b/src/oop/oop2.py
@@ -4,9 +4,11 @@
 # object is constructed.
 
 class GroundVehicle():
-    def __init__(self, num_wheels):
+    def __init__(self, num_wheels = 4):
         self.num_wheels = num_wheels
-
+        
+    def drive(self):
+        return "vroooom"    
     # TODO
 
 
@@ -19,6 +21,13 @@ def __init__(self, num_wheels):
 
 # TODO
 
+class Motorcycle(GroundVehicle):
+    def __init__(self, num_wheels = 2):
+        super().__init__(num_wheels)
+
+    def drive(self):
+        return "BRAAAP!!"    
+
 vehicles = [
     GroundVehicle(),
     GroundVehicle(),
@@ -29,4 +38,7 @@ def __init__(self, num_wheels):
 
 # Go through the vehicles list and print the result of calling drive() on each.
 
+for item in vehicles:
+    print(item.drive())
+
 # TODO