please help with a)

Q2: After graduating from college, you and your friends start selling birdhouses made from recycled plastics. The idea has caught on, as shown by the following sales figures: Month Demand March 2,200 April 2,240 May 1,790 June 4,270 July 3,530 August 4,990 1. Prepare forecasts for June through September by using a three-period moving average model. 2. What is the forecast for September if you use an exponential smoothing model with alpha=0.5? 3. What is the value of ME, MAD, and MAPE, if you use two-period weighted moving average with w1=0.3 and w2=0.77