ive different forecasters were using different methods of forecasting to create forecasts for the demand of Version 4 Beta Chargers. Shown in the table are the observed values as well as the forecasted values.

Period	Observed Value	Forecast A	Forecast B	Forecast C	Forecast D	Forecast E
1	70	-	-	-	-	-
2	60	70	75	65	70	100
3	58	65	65	55	60	55
4	62	62	60	50	58	60
5	71	64	68	55	62	70
6	50	68	75	65	71	50

(a) Compute the Mean Squared Error of Forecast D.

(b) Compute the Mean Absolute Percent Error of Forecast A.

(c) According to the MAD error measure, which Forecast did better, C or E?