I am getting below error

"Oops, try again. get_letter_grade(100) resulted in an error: global name 'score' is not defined"

not sure how to define the score

```
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) / len(numbers)
return total
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 (socre):
if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
```