Please show work

Consider the following time series data. Week 1 2 3 4 5 6 Value 18 13 16 11 17 14 a. Use a = 0.2 to compute the exponential smoothing forecasts for this time series. Compute MSE. 10.86 13.84 13.03 12.61 b. Use exponential smoothing with a = 0.2 to develop a forecast for week 7. 15.27 15.92 15.35 15.53 c. Use a smoothing constant of a = 0.4 to compute the exponential smoothing forecasts. Compute MSE. 10.07 11.78 12.93 12.09 d. Use exponential smoothing with a = 0.4 to develop a forecast for week 7. 14.35 14.12 O 14.72 14.98