Suppose that a population 2 consists of only 4s and 7s. Let X be a randomly selected element of $2. Suppose that P (X = 7) = 0 where O is an unknown population parame Find the following. A- P( X = 4) B- E(X) Let S = ( 4, 4, 7, 7, 7 ) be a simple random sample drawn from the population J. C- Estimate the population parameter 6 using the data in the sample S by the method of moments. D- Estimate the population parameter 6 using the data in the sample S by the method of maximum likelihood