def score_average(s):

"""

(str) -> float

Given s, a string representation of a sequence of four floating

point numbers formatted as 'number1,number2,number3,number4',

e.g., '1.0,12.0,13.0,2.0', calculate the average and return the average

in s as a floating point number.

>>> score_average('10.0,20.0,30.0,0.0')

15.0

"""

## TODO: YOUR CODE HERE

def score_range(s):

"""

(str) -> float

Given s, a string representation of a sequence of four floating

point numbers formatted as 'number1,number2,number3,number4',

e.g., '1.0,12.0,13.0,2.0', calculate, and return, the difference

between the maximum and minimum values

>>> score_range('10.0,20.0,30.0,0.0')

30.0

"""

#TODO: YOUR CODE HERE

def email_to_full_name(email):

"""

(str) -> str

Given a string with the format "first_name.last_name@mail.utoronto.ca",

return a string "LAST_NAME,FIRST_NAME" where all the characters are upper

case

>>> email_to_full_name("anna.conda@mail.utoronto.ca")

CONDA,ANNA

"""

## TODO: YOUR CODE HERE

def student_quiz_results(email,marks):

"""

(str,str) -> str

Given a student's email with the format "first_name.last_name@mail.utoronto.ca"

and marks from 4 quizzes formatted as

"floating_point_number1,floating_point_number2", return

a string "", where

FIRST_NAME and LAST_NAME are the first and last names of the student

in all upper case characters, average_mark is the mean of the 4 quiz

scores and range_of_scores is the difference between the highest and

lowest score achieved.

>>> student_quiz_results("anna.conda@mail.utoronto.ca","10.0,20.0,30.0,0.0")

''

"""

## TODO: YOUR CODE HERE

## TODO: YOUR TEST CODE HERE - REMEMBER TO DELETE THESE LINES BEFORE SUBMITTING

## END TEST CODE - DELETE BEFORE SUBMISSION