Suppose, at a local movie theater, the amount of money that a man spends at the concession has an average of 18 dollars and a standard deviation of 4.9 dollars. As well, the amount of money that a woman spends at the concession has an average of 11 dollars and a standard deviation of 3.6 dollars.

(a) What is the expected difference in the amount spent by a man and a woman at the concession? Answer: dollars (b) What is the standard deviation for this difference? (Round your answers to four decimal places, if needed.) Answer: dollars (c) What is the expected total amount spent by a man and a woman at the concession? Answer: dollars (d)What is the standard deviation for this total amount? (Round your answers to four decimal places, if needed.) Answer: dollars