Problem 1 Compare WMA(4) and Exponential Smoothing techniques using MSE and MAPE (measures of performance). In the case of WMA(4), use the following weights: 0.4;0.3;0.2; and 0.1 . In the case of Exponential Smoothing, use an value =0.35. The Grid for Problem 1 provides the actual sales data of a certain product from January to July. Hint: You may choose to put down your work on the Grid for Problem 1