Suppose a compact disk(CD) you just purchased has 21 tracks. After listening to theCD, you decide that you like 7 of the songs. The random feature on your CD player will play each of the 21 songs once in a random order. Find the probability that among the first 5 songs played(a) you like 2 ofthem; (b) you like 3 ofthem; (c) you like all 5 of them.