Definition: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Input: Problem: on sunday, bill ran 4 more miles than he ran on saturday. julia did not run on saturday, but she ran twice the number of miles on sunday that bill ran on sunday. if bill and julia ran a total of 36 miles on saturday and sunday, how many miles did bill run on sunday ?
Options: a. 5, b. 6, c. 7, d. 8, e. 10
Output:
e