Q 4(4.92) The owner of a furniture store was attempting to analyze the relationship between advertising and sales, and recorded the monthly advertising budget ($000s) and the sales ($m) for a sample of 12 months. The data are listed here. Advertising 23 46 60 54 28 33 25 31 36 88 90 Sales 99 6.6 11.3 12.8 9.8 8.9 12.5 12.0 11.4 12.6 13.7 14.4 15.9 a. Estimate the simple linear regression equation and interpret coefficients b. Determine the coefficient of determination [- and interpret