The accompanying data table show the percentage of tax returns filed electronically in a city from 2000 to 2009. Complete parts a through e below. Click the icon to view the percentage of tax returns filed electronically by year. a) Forecast the percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with a = 0.1. The percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with a = 0.1 is 42 . (Round to the nearest integer as needed.) b) Calculate the MAD for the forecast in part a. MAD = 17.02 (Round to two decimal places as needed.) c) Forecast the percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with trend adjustment. Set a = 0.4 and p = 0.6. The percentage of tax returns that will be electronically filed for 2010 using exponential smoothing with trend adjustment using o = 0.4 and p = 0.6 is (Round to the nearest integer as needed.) Percentage of tax returns filed electronically by year X Year Percentage 2000 27 2001 31 2002 37 2003 41 2004 47 2005 50 2006 55 2007 57 2008 61 2009 64