0. In the past approximately 4% of persons convicted of felonies served their full sentence. To see if former prisoners at one particular prison are being treated like prisoners in general, we will take a sample of 200 of them picked at random. We will approximate the probability that at least 6 of them had to serve their full sentence. In this case, either Poisson approximation or normal approximation might plausibly be applied. a) Use Poisson approximation on this question b) Use normal approximation on this same question, and compare the answer to a).