Find the indicated probabilities. If convenient, use technology to find the probabilities.

Utility Bills: The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $12. A utility bill is randomly selected.

(a) Find the probability that the utility bill is less than $70 (b) Find the probability that the utility bill is between $90 & $120. (c) Find the probability that the utility bill is more than $140.