Electricity bills:According to a government energy agency, the mean monthly household electricity bill in the United States in2011was$

110.42. Assume the amounts are normally distributed with standard deviation$22.00. Use the TI-84 Plus calculator to answer the following.

Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $110.42 . Assume the amounts are normally distributed with standard deviation $22.00 . Use the TI-84 Plus calculator to answer the following. (a) What proportion of bills are greater than $128 ? (b) What proportion of bills are between $85 and $137? (c) What is the probability that a randomly selected household had a monthly bill less than $120? Round the answers to at least four decimal places. The proportion of bills that are greater than $128 is D. The proportion of bills that are between $85 and $137 ism. The probability that a randomly selected household had a monthly bill less than $120 is E]