How is everybody doing

whenevr u run this i get this error, and ive looked on the Q&A form and the same solution that helped everyone else is not working for me

Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade

```
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):
total1 = sum(numbers)
total = float(total1)
return total / len(numbers)
def get_average(student):
homework = average(student["homework"]) * .1
quizzes = average(student["quizzes"]) * .3
tests = average(student["tests"]) * .6
return homework + quizzes + tests
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'
average = get_average(tyler)
print get_letter_grade(average)
def get_class_average(students):
results=[]
for indi in students:
results.append(get_average(indi))
return average(results)
students = [lloyd, alice, tyler]
print getclassaverage(students)
print getlettergrade(getclass_average(students))
```