I've been stuck on this for a while and I've had to try a few other solutions. I would massively appreciate any help! This is my code:

lloyd = {

"name": "Lloyd",

"homework": [90.0, 97.0, 75.0, 92.0],

"quizzes": [88.0, 40.0, 94.0],

"tests": [75.0, 90.0]

}

alice = {

"name": "Alice",

"homework": [100.0, 92.0, 98.0, 100.0],

"quizzes": [82.0, 83.0, 91.0],

"tests": [89.0, 97.0]

}

tyler = {

"name": "Tyler",

"homework": [0.0, 87.0, 75.0, 22.0],

"quizzes": [0.0, 75.0, 78.0],

"tests": [100.0, 100.0]

}

# Add your function below!

def average(numbers):

total = sum(numbers)

total = float(total)

total = total / len(numbers)

return total

def get_average(student):

return average(student["homework"])*0.1 + \

average(student["tests"])*0.6 + \

average(student["quizzes"])*0.3

def get_letter_grade(score):

if score >= 90:

return "A"

elif score >= 80:

return "B"

elif score >= 70:

return "C"

elif score >= 60:

return "D"

else:

return "F"

def get_class_average(students):

results=[]

for student in students:

get_average(student)

results.append(get_average(student))

return average(results)

students = [lloyd, alice, tyler]

print get_class_average(students)

print get_letter_grade(get_class_average(students))

It says "One of the following is missing or broken when we tried to use it: alice, lloyd, taylor, students, get_class_average, get_letter_grade." Thanks if you can help!