Problem 3. To get full credit, please show all your work. Consider the following data set: Month Actual Sales Forecast 1 Forecast 2 1 799 769 771 785 2 789 787 3 794 790 792 4 780 784 798 7 5 768 769 774 6 779 768 770 763 7 761 760 785 8 771 775 9 786 784 788 10 805 788 788 a. Calculate MAD and MSE for each forecast (forecast 1 and forecast 2). b. Calculate MAPE for each forecast (forecast 1 and forecast 2)