2. (8pts each) Accountants at Taxes 'R'Us each complete a different number of tax returns each day. Let X represent the number of returns completed by an accountant. The table below shows different possible values for X and the chances that an accountant would complete that number of returns in a day. X 2 3 4 5 P(X) 0.012 0.123 0.234 0.345 0.286 What is the probability that an accountant completes either 1 return or over 3 returns? b) What is the average and standard deviation for number of returns completed by an accountant? Include appropriate units and symbols in your