Oops, try again. get_class_average([alice]) returned 0.0 instead of 91.15 as expected

I am really stuck . i would appreciate any help.

```
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]
}
def average (numbers):
total=float( sum(numbers))
result=total/len(numbers)
return result
def get_average(student):
homework=average(student["homework"])
quizzes=average(student["quizzes"])
tests=average(student["tests"])
total= homework*0.1+quizzes*0.3+tests*0.6
return total
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"
print get_letter_grade(get_average(lloyd))
def get_class_average(students):
students=['lloyd','alice','tyler']
results=[]
x=0
for each in students:
get_average_student=x
results.append(x)
return average(results)
```