Sale amounts during lunch hour at a local subway are normally distributed, with a mean $7.91, and a standard deviation of $1.28. a. Find the probability that a randomly selected sale was at least $8.572 Round answer to 4 decimal places. b. A particular sale was $11.51. What is the percentile rank for this sale amount? Round answer to the nearest percentage. [hint: round proportion to two decimal places then convert to percent.] % c. Give the sale amount that is the cutoff for the highest 15 %? Round answer to 2 decimal places. d. What is the probability that a randomly selected sale is between $4.00 and $10.00? Round answer to 4 decimal places. e. What sale amount represents the cutoff for the middle 63 percent of sales? Round answers to 2 decimal places. (The smaller number here) (Bigger number here)