In how many ways could 10 different questions be arranged on your next quiz if: a) there are no restrictions? b) the easiest question must be first? c) the easiest question must be first and the most...

In how many ways could 10 different questions be arranged on your next quiz if:

1. a) there are no restrictions?

1. b) the easiest question must be first?

1. c) the easiest question must be first and the most difficult question must be last?

1. d) the easiest question and the most difficult question must be side-by-side?

1. e) the easiest question and the most difficult question must NOT be side-by-side?