Q10 and Q20 please

Problem 3 A random variable X has the following probability distribution: The expected value of X is (09) The standard error of X is (010) Problem 6 A population of 1000 voters contains 390 Republicans, 550 Democrats, and 60 independents and members of other parties. A simple random sample of 100 voters will be drawn from this population. The expected number of Republicans in the sample is (019) . The standard error of the number of Republicans in the sample is (020)