4. During an annual heating season, the average gas bill for customers in a New England community heating their homes with gas was $451 Assuming a normal distribution and a standard deviation of $80: a. What proportion of homes heating with gas had a gas bill over $382? I). What proportion of homes heating with gas had a gas bill between $49? and 5553?? c. What amount was exceeded by only.r 2.5% of the homes heating with gas? 11. What amount was exceeded by 95% of the homes heating with gas