Please Help in solving this problem using excel or basic understanding formulas for dummies.

With =0.1 and the initial forecast for October of $1.78, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): With =0.3 and the initial forecast for October of $1.76, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): With =0.5 and the initial forecast for October of $1.72, using exponential smoothing, the forecast for periods 11 and 12 is (round your responses to two decimal places): Based on the mean absolute deviation, the better forecast is achieved using =0.5