The following data represents number of customers arriving at Quick Lube for an oil change between 8 and 11 AM over the past 6 days. 12, 9, 11, 12, 10, 13. a. Using 3 day moving average, forecast day 7. b. Using exponential smoothing with alpha = .3, forecast day 7. c. Compute the MAD statistic for the moving average forecast (from part a). d. Compute MAD for the exponential smoothing forecast (from part b).