Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Letxbe a random variable that represents the number of milligrams of porphyrin per deciliter of blood. In healthy circles,xis approximately normally distributed with mean=39and standard deviation=13. Find the following probabilities. (Round your answers to four decimal places.)

(a)xis less than 60

(b)xis greater than 16