Actual sales of a product are given as follows: Period 1 2 3 4 5 6 7 8 Actual sales 110 106 108 109 112 98 102 104 Forecast for the first period is 107. Assume smoothing constant = 0.7 and trend smoothing constant = 0.5.

i) Find the weighted moving average considering 3 recent last periods and giving weights of 0.40, 0.36 and 0.24.

ii) Forecast by exponential smoothing for each of the