Five different forecasters were using different methods of forecasting to create forecasts for the derrund af Version 1 Beta Chargers shown in the table are the observed as a well as the forecasted values Period Observed Value Forecast Forecast Forecast Forecast " Forecast 1 2 70 3 70 60 58 62 71 50 70 65 62 60 4 75 65 60 68 75 65 SS SO 55 65 100 55 60 70 50 58 62 71 64 168 (a) Compute the Mean Absolute Deviation of Forecast ib) Compute the Mean Squared Error of Forecast B. (c) According to the MAPE error measure, which Forecast did better, Dor