For the data below, based on a 3 period moving average forecasting method calculate the following:

Year	Quarter	Sales
1	1	154
	2	130
	3	186
	4	182
2	1	145
	2	118
	3	145
	4	120
3	1	114
	2	149
	3	183
	4	103
4	1	132
	2	186
	3	182
	4	105
5	1	178
	2	180
	3	153
	4	128

1) Calculate the mean absolute error. ANSWER TO 2 DECIMAL PLACES

2) Calculate the mean square error. ANSWER TO 2 DECIMAL PLACES

3) Calculate the absolute percentage error. ANSWER AS A PERCENT TO 2 DECIMAL PLACES...INCLUDE UNITS (I.E. THE PERCENT SIGN)

4) Predict the the number of sales for the first quarter of year 6. ANSWER TO 0 DECIMAL PLACES