What is the age distribution of promotion-sensitive shoppers? A supermarket super shopper is defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon. Age range, years 18-28 29-39 40-50 51-61 62 and overMidpoint x 23 34 45 56 67Percent of super shoppers 9% 43% 22% 10% 16%For the 62-and-over group, use the midpoint 67 years.(c) Compute the expected age ? of a super shopper. (Round your answer to two decimal places.) ? = yr(d) Compute the standard deviation ? for ages of super shoppers. (Round your answer to two decimal places.) ? = yr