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.

[EX Q]: Problem: a ( 3, w ^ 3 ) is the ( x, y ) coordinate of point located on the parabola y = x ^ 2 - 1. what is the value of w ?
Options: a. 2., b. 4., c. 5., d. 6., e. 9.
[EX A]: a

[EX Q]: Problem: if the average of 5 positive integers is 50 and the difference between the largest and the smallest of these 5 numbers is 10, what is the maximum value possible for the largest of these 5 integers ?
Options: a. 50, b. 58, c. 49, d. 48, e. 44
[EX A]: b

[EX Q]: Problem: of the families in city x in 1994, 35 percent owned a personal computer. the number of families in city x owning a computer in 1998 was 20 percent greater than it was in 1994, and the total number of families in city x was 4 percent greater in 1998 than it was in 1994. what percent of the families in city x owned a personal computer in 1998 ?
Options: a. 50.12 %, b. 40.52 %, c. 40.56 %, d. 40.38 %, e. 40.14 %
[EX A]:
d