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.

Problem: how many prime numbers are between 76 / 8 and 124 / 5 ?
Options: a. 1, b. 2, c. 3, d. 4, e. 5
e

Problem: if a and b are the roots of the equation x 2 - 9 x + 9 = 0, then the value of a 2 + b 2 is :
Options: a. 63, b. 24, c. 17, d. 6, e. 5
a

Problem: there are 2 red chips and 3 blue ones. when arranged in a row, they form a certain color pattern, for example rbrrb. how many color patterns ?
Options: a. a. 10, b. b. 12, c. c. 24, d. d. 60, e. e. 100

e