Let x be a random variable that represents the level of glucose in the blood (milligrams per deciliter of blood) after a 12 hour fast. Assume that for people under 50 years old, x has a distribution that is approximately normal, with mean = 65 and estimated standard deviation = 16. A test result x < 40 is an indication of severe excess insulin, and medication is usually prescribed.

A-What is the probability that, on a single test, x < 40? (Round your answer to four decimal places.)

B-What is the probability that x < 40? (Round your answer to four decimal places.)