Using simple exponential smoothing and the following time series data, respond to each of the items. Required: Click here for the Excel Data File b. Compute all possible forecasts using a smoothing coefficient (d) of 0.3 . Note: Negatlve omounts should be Indlcated by a mlnus sign. Round all your answers to 1 declmel place except "Absolute error" and "Absolute percent error" answers whlch should be rounded to 2 declmal pleces. c. Compute the MAD and MAPE. Note: Round your answers to 2 declmal places. d. What is the forecast demand for period 11 ? Note: Round your answer to 1 declmal place. e. What is the error associated with period 11 's forecast? Note: Round your answer to 2 declmal places