Please look at both picture I provide because the second picture I give the sales data given in question 7

Do not consider 'error measurement' 9. Consider the sales data for Computer Success given in Problem 7. a. Use a 3-month weighted moving average to forecast the sales for the months April through December. Use weights of (4/8),(3/8), and (1/8), giving more weight to more recent data. b. Use exponential smoothing with =0.6 to forecast the sales for the months April through December. Assume that the initial forecast for January was $3,200. Start error measurement in April. 7. Sales for the past 12 months at Computer Success are given here