(b)What is the probability thatxis between $41and $47? (Round your answer to four decimal places.) (c)Let us assume thatxhas a distribution that is approximately normal. What is the probability thatxis between $41and $47? (Round your answer to four decimal places.) (d)In part (b), we usedx, theaverageamount spent, computed for40customers. In part (c), we usedx, the amount spent by onlyonecustomer. The answers to parts (b) and (c) are very different. Why would this happen?