Given are five observations for two variables, and . 2 7 14 18 20 51 54 43 17 14 The estimated regression equation for these data is . a. Compute , , and . (to 2 decimals) (to 2 decimals) (to 2 decimals) b. Compute the coefficient of determination . Comment on the goodness of fit. (to 3 decimals) The least squares line provided an good fit; of the variability in has been explained by the estimated regression equation (to 1 decimal). c. Compute the sample correlation coefficient. Enter negative value as negative number. (to 3 decimals)