A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per decilitre (1/10 of a later) of blood. After a 12-hour fast, the random variable x will have a distribution that is approximately normal with mean= 85 and standard deviation

= 25. What is the probability that, for an adult after a 12-hour fast,

a) x is more than 60?

b) x is less than 110?

c) x is between 60 and 110?

d) x is greater than 140 ?