Answer only Part B and C with complete steps to get 100% feedback!!

a) The last seven weeks of demand at a new car dealer are shown below. Use three-period moving average to determine a forecast for the week 4, week 5, week 6, and week 7. Calculate the MAD. (4 points) Week SalesForecasting 118 230 3 24 | 435 5 30 632 | 736 b) With the same sales data in part (a), use exponential smoothing with an alpha of 0.5 to determine a forecast from week 2 to week 7 with an initial forecast of 18 for Week 1. Calculate the MAD. (5 points) Week Sales Forecasting (alpha=0.5) 11818 2 30 435 5 30 6 32 | 736 c) Which method will you use? Give your explanation. (2 points)