Consider the quarterly sales data:data1 = {10, 31, 43, 16, 11, 33, 45, 17, 14, 46, 50, 21, 19, 41, 55,25}.Forecast the volatility for the next quarter a) using EWMA with= 0:9N(whereNis the last digit of your student number) b) using GARCH(1,1) with!= 0:000002,= 0:04and= 0: N=6 where is N = 6