PM Computer assembles customized personal computers from generic parts. The owners purchase generic computer parts in volume at a discount from a variety of sources whenever they see a good deal. It is important that they develop a good forecast of demand for their computers so they can purchase component parts efficiently. a) Compute a 2-month moving average. (5%) b) Compute a 3-month weighted average using weights of 4,2 , 1 for the past three months of datn. (5%) c) Compute an exponential smoothing forecast using =0.7, previous forecast of 40 . (5\%) d) Using MAD, what forecast is most accurate? (54)