Hi! Can someone help me with my code. I have visited other topics but was not able to figure it out.

Oops, try again. get_class_average([alice]) resulted in an error: global name 'average' is not defined

```
# Add your function below!
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return 0.1 * average(student["homework"]) + \
0.3 * average(student["quizzes"]) + \
0.6 * average(student["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"
print get_letter_grade(lloyd)
def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)
```