Six stand-up comics, A, B, C, D, E, and F, are to perform on a single evening at a comedy club. The order of performance is determined by random selection. Find the probability that: a. Comic F will perform fifth b. Comic A will perform fifth and Comic C will perform second. c. The comedians will perform in the following order: F, A, C, E, B, D d. Comic B or Comic D will perform third a. (Type a fraction. Simplify your answer.)