Find the indicated probabilities for a binomial random variable X.
1. P(X) is at most 2 when n = 11, p = .4
2. P P(X) is no less than 6 when n = 9, p = .7
3. P(X) is greater than 18 when n = 20, p = .9
4. P(X) is no more than 1 when n = 15, p = .2
5. P(X) is at least 15 when n = 16, p = .7