A report in a research journal states that the average weight loss of people on a certain drug is 33 lbs with a margin of error of ±4 lbs with confidence level C = 95%.(a) According to this information, the mean weight loss of people on this drug, population mean, could be as low as ____ lbs.(b) If the study is repeated, how large should the sample size be so that the margin of error would be less than 2 lbs? (Assume standard deviation= 7 lbs.)ANSWER: ?