Just need help with the bottom part that is left blank. Also need the MAD for it done with .90

Sales of Volkswagen's popular Beetle have grown steadily at auto dealerships in Nevada during the past 5 years (see table below). Using exponential smoothing with a smoothing constant (a) of 0.30 and a starting forecast of 410.00, the following sales forecast has been developed: Year Sales Forecasted Sales 410.00 2005 2006 422.00 450 495 520 563 2007 443.90 2008 466.73 2009 585 495.61 The MAD for a forecast developed using exponential smoothing with a = 0.30 is 74.75 sales (round your response to two decimal places). Forecasted sales for years 2006 through 2010 using exponential smoothing with = 0.60 and a starting forecast of 410.00 are (round your responses to two decimal places): 2007 2008 2009 2010 470.6 500.24 537.90 566.16 Year 2005 2006 Forecasted Sales 410.00 434 The MAD for a forecast developed using exponential smoothing with a = 0.60 is 51.85 sales (round your response to two decimal places). Forecasted sales for years 2006 through 2010 using exponential smoothing with = 0.90 and a starting forecast of 410.00 are (round your responses to two decimal places): Year 2007 2008 2009 2010 2005 2006 410.00 Forecasted Sales