An article in Wear (1992, Vol. 152, pp. 171-181) presents data on the fretting wear of mild steel and oil viscosity. Representative data follow with x - oil viscosity and y - wear volume (10"*cubic millimeters). y 240 181 193 155 172 110 113 75 94 K 1.6 94 15.5 20.0 22.0 35.5 43.0 40.5 33.0 Round your answers to two decimal places (e.g. 98.76). (a) Construct a scatter plot of the data. Does a simple linear regression model appear to be plausible? O Yes O No (b) Fit the simple linear regression model using least squares. Find an estimate of of. D = Pot Bix Po= i B1= i 62. i (c) Predict fretting wear when viscosity x - 30. 1 = (d) Obtain the fitted value of ywhen x - 22.0 and calculate the corresponding residual. D =