Help with this one

A simple random of 2000 adults is selected from a population of 1,000,000 adults. The selected individuals were asked: "Do you know how to swim?\" Suppose that, in fact, 10% of the adults in the population swim. {a} Find the mean and standard deviation of the proportion, 10, of the sample who can swim. {b} What sample size would he sequiied to reduce the standard deviation to one-tenth of the value you found in {a}? {e} Use the normal approxiination to nd the probabilityr that less than 10% of the sample swim