Probability Q on more difficult level

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Q. The even numbers on one otherwise white regular die are painted blue, while the perfect squares on a second regular die are painted blue. What is the probability that both dice will turn up blue when rolled together?

Q. Thomas has two CD’s and two tapes. In how many arrangements can he play the CD’s and tapes one after the other such that each is played exactly once and one CD is not played immediately before or after the other?

Q. same question but 3 CD and 2 tapes?

Q. In how many ways can 10 candidates (5 male and 5 female) be selected for 3 vacancies of which one vacancy is reserved for a female candidates?

 

[redchesus]

The first one isn't that difficult, unless I'm missing something?

even numbers on a die are 2, 4, and 6 so (3/6)
perfect squares on a die are 1 and 4 so (2/6)

(3/6)(2/6) = (1/2)(1/3) = 1/6