Two independent forecasting methods based on judgement have been prepared for the period shown below. Actual sales were also recorded as comparison Month Sales Forecast 1 Forecast 2 1 770 771 769 2 789 785 787 3 794 790 792 4 780 784 798 5 768 770 774 6 772 768 770 7 760 761 759 8 775 771 775 9 786 784 788 10 790 788 788 a. Compute MAD and MSE for each forecast technique b. Which technique is more accurate