show calculation steps please

Q#2: Product sales since 2001 are: Year 2001 2002 2003 2004 2005 Sales 173 241 198 258 290 2006 2007 2008 2009 327 338 378 391 The least squares trend equation is given as: V = 100 + 28t, where t is set equal to 1 for 2001. a) What were the predicted sales in 2006? b) What were the predicted sales for 2009? c) On average, how much did sales change per year from 2001 to 2009? d) What is the three-year moving average for 2007 to 2009