Suppose a four period weighted average is being used to forecast demand. Weights for the periods are: W-40.1 W-3 = 0.2 Wt-20.35 W-10.35 Demand observed in the previous four periods was: A-415,665 A3-15,422 A-2-14,894 A-1-14.486 What will be the demand forecast for period t? (Keep one decimal place in your answer). For the data given below, what would the naive forecast (with a trend) be for period 5? Period Demand 1 7.054 2 7.081 7.100 7.086 (Keep three decimal places in your answer) 3 4 E Given the following forecast errors, calculate the MSE: 15.53 81.22 4.09 5.00 11.34 (Keep one decimal place) 117.18 1751.1 1752.0 7008.2