Question 20 of 20 (3 points) | Question Attempt: 1 of 1 Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $ 108.22. Assume the amounts are normally distributed with standard deviation $ 19.00. 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 $82 and $135? (c) What is the probability that a randomly selected household had a monthly bill less than $111? Round the answers to at least four decimal places. Part 1 of 3 The proportion of bills that are greater than $125 is X Part 2 of 3 The proportion of bills that are between $82 and $135 is X 5