Please help me with the question C with all the step!!! thanks you so much

Storrs Cycles has just started selling the new Cyclone mountain bike, with monthly sales as shown in the tab Month Jan Feb Mar Apr 365 Sales 404 380 418 a) Based on the given monthly sales data, it can be said that there is not a strong linear trend in sales over time. b) First, co-owner Bob Day wants to forecast by exponential smoothing by initially setting February's forecast equal to January's sales with a = 0.20. Using the forecasting method, Bob's forecast for the month of May is (round your response to two decimal places): Month Sales Forecast Jan 404 Feb 380 404.00 b) First, co-owner Bob Day wants to forecast by exponential smoothing by initially setting February's forecast equal to January's sales with a = 0.20. Using the forecasting method, Bob's forecast for the month of May is (round your response to two decimal places): Month Sales Forecast Jan Feb Mar Apr May 404 380 418 365 404.00 399.20 402.96 - 395.37 Second, co-owner Sherry Snyder wants to forecast using a three-period moving average. The forecast for the month of May is (round your response to two decimal places). Second, co-owner Sherry Snyder wants to forecast using a three-period moving average. The forecast for the month of May is (round your response to two decimal places). Month Sales Forecast Jan Feb Mar Apr May 404 380 418 365 400.67 387.67 c) Assume that May's actual sales figure turns out to be 400. For the forecast developed by Bob using exponential smoothing, the mean absolute deviation (MAD) = sales (round your response to two decimal places). =