I need step by step full workings. thanks

Weekly sales of copy paper at Cubicle Suppliers are provided in the table below. Compute a three-period moving average and exponential smoothing with alpha=0.5 given the forecast for 1 week as 15. Week Sales (Cases) 11 17 2 21 3 27 14 31 15 19 a. (2 pts) Compute the MAD for 3-week moving average using weeks 4 and 5. (round your responses to 2 decimal places) X b. (3 pts) Compute the MAD for Exponential smoothing with alpha=0.5 using weeks 4 and 5. (round your responses to 2 decimal places) b. (2 pts) Which model is more accurate based on MAD calculated using weeks 4 and 5 data? MovingAverage X Mark 0.00 out of 2.00 C. (3 pts) What is the forecast for week 6 with the more accurate method?(round your responses to 2 decimal places)