A student was performed on a type of bearing to find the relationship of amount of wear y to x, = oil viscosity and X2 = load. The accompanying data were obtained. Complete parts (a) and (b) below. Click here to view the bearing data. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. (a) Estimate of using multiple regression of y on x, and X2. s2 = 695.5 (Round to one decimal place as needed.) (b) Compute predicted values, a 95% confidence interval for mean wear, and a 95% prediction interval for observed wear if x, = 15 and X2 = 1100. y= 159.455 Bearing Data X (Round to three decimal places as needed.) Determine the 95% confidence interval for mean wear if x, = 15 and X2 = 1100.