Could You help me solve each grey box please?

The MAD for a forecast developed using exponential smoothing with a in 0.30 is sales (round your response to two decimal places). Forecasted sales for years 2 through 6 using exponential smoothing with =0.60 and a starting forecast of 415.00 are (round your responses fo two decimal praces): The MAD for a forecast developed using exponential smoothing with =0.60 is sales (round your response to two decimal places). Forecasted sales for years 2 through 6 using exponential smoothing with =0.90 and a starting forecast of 415.00 are (round your responses to fwo decimat placest: The MAD for a forecast developed using exponential smoothing with =0.90 is sales (round your response to two decimal places)