Year 1 2 Sales 455 502 518 563 575 a) Forecasted sales for year 6 using the trend projection (linear regression) method are sales (round your response to one decimal place b) The MAD for a linear regression forecast is sales (round your response to one decimal place). c) The MSE for the linear regression forecast is sales (round your response to one decimal place). Enter your answer in each of the answer boxes