Part - B: Mathematical Problem Marks - 15 1. The Monthly demand for unit manufactured by the PQR Company are as follows: Units 75 65 63 102 89 85 87 90 93 Month January February March April May June July August September a. Use a four-month weighted moving average to forecast the units of Month October by using weights of 40%, 30%, 20% & 10% respectively. (3) b. Use exponential smoothing with a=0.2 to forecast the units of Month October (3) C. Calculate the MAD & MSE. (2)