At Sweet Holes Donut Shop, the number of calories in an apple fritter varies according to a normal distribution possessing an average of 294 calories and a standard deviation of 25 calories. Let X represent the number of calories in an apple fritter selected at random. (a) What is the probability an apple fritter will contain more than 280 calories? (b) What is the probability an apple fritter will contain between 302 and 309 calories? (c) Approximately four (4) percent of all apple fritters have less than how many calories?