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)

return float(total)/len(numbers)

def get_average(student):

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"

result=get_letter_grade(get_average(lloyd))

print result

def get_class_average(students):

results=[]

for i in students:

result=get_average(i)

results.append(result)

return average(results)

students=[alice, lloyd, tyler]

average=get_class_average(students)

print average

print get_letter_grade(average)