A recent article in Business Magazine listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies was selected and the sales and earnings, in millions of dollars, are reported below. Sales Earnings Sales Earnings Company ($ millions) ($ millions) Company ($ millions) ($ millions) A $86.2 $5 G $17.1 $2.6 B 19.4 4.4 H 13.3 1.7 C 18.5 1.3 16.2 3.6 D 70.2 7.9 J 54.8 8.3 E 55.1 6.5 K 29.2 6.1 F 46.1 4.2 L 67.4 10 a. Conduct a test of hypothesis to show whether there is a relationship between sales and earnings. Show that the slope of the regression is different from zero. b. Determine the coefficient of determination. Interpret this value. c. Determine the standard error of estimate. About 95 percent of the residuals will between what two values