I just can't see what is wrong here. Anybody know?

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 get_average(student):

homework=average(student["homework"])

quizzes=average(student["quizzes"])

tests=average(student["tests"])

return (.1 * (homework) + .3 * (quizzes) + .6 * (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"
```

def get_class_average(students):

for i in students:

x=get_average(i)

results.append(x)

print results

z=average(results)

return z

results=[]

students=[lloyd, alice, tyler]

print get_class_average(students)