Suppose a random variable X has mean 20 and variance XXXXXXXXXXGive your approximation bound for P(X>50) (2) Give your approximation bound for P(|X-20|>10) (3) Now I collect 64 i.i.d (independent and...

Suppose a random variable X has mean 20 and variance 25. (1) Give your approximation bound for P(X>50)

(2) Give your approximation bound for P(|X-20|>10)
(3) Now I collect 64 i.i.d (independent and identical) sample data from the population of X, what is mean and standard deviation of sample mean, ??(4)Approximate the probability of P(?<21), please="" also="" write="" the="" reason="" that="" you can="" do="" this="">

please explain fully each step