There are n ≥ 2 shooters who are going to shoot against the same target, independently of one another. If the probability that the ith shooter finds the target is pi, for i = 1, 2,…, n, find the probability that

(i) none of them find the target;

(ii) exactly one finds the target;

(iii) at least two find the target.

(Hint: Use the results of Example 3.18 and Part (i) in Exercise 20.)