Problem 2. At the Grub Market, the average weekly grocery bill is $100, with a standard deviation of $25. Show work. a. What percent of the Grub Market's customers spend over $105? b. What percent of the Grub Market's spend less than $80? c. What percent of the Grub Market's customers spend between $85 and $110? d. What would be smallest and largest amounts spend on grocery at 1.5 standard deviation from the mean?