Suppose the amount of Skim Milk contained in "quart" bottles sold by a certain upstate dairy is a Normally Distributed continuous random variable X, with a mean of 32 fluid ounces and a standard deviation of 12 fluid ounces. If a quart bottle of Skim Milk sold by this dairy is randomly selected by a Quality Control Inspector a. Find the probability that the actual amount of milk in a quart bottle is less than 31 fluid Ounces. b. Find the probability that the actual amount of milk in a quart bottle is between 30.75 and 32.75 fluid ounces.