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)

x = total/len(numbers)

return x

def get_average(student):

homework=average(student["homework"])

quizzes=average(student["quizzes"])

tests=average(student["tests"])

return 0.1*homework+0.3*quizzes+0.6*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"

print get_letter_grade(get_average(lloyd))

def get_class_average(students):

results=[]

results.append(get_average(lloyd))

results.append(get_average(alice))

results.append(get_average(tyler))

return average(results)