=8 = 9 10 11 12 = 13 14 15 16 - 17 18 19 Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $110.56. Assume the amounts are normally distributed with standard deviation $25.00. Use the TI-84 Plus calculator to answer the following. (a) What proportion of bills are greater than $125? (b) What proportion of bills are between $83 and $143? (c) What is the probability that a randomly selected household had a monthly bill less than $113? Round the answers to at least four decimal places. Part 1 of 3 The proportion of bills that are greater than $125 is X