The distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.7 ounces and standard deviation 0.19 ounces. (a) What is the probability that the average weight of a SRS of five of these chocolate bars is between 7.52 and 7.8 ounces? (b) For a SRS of five of these chocolate bars, what is the level L such that there is a 3% chance that the average weight is less than L?