8.) Below are MPGs of some random cars vs. the car's age in years. Age 1 3 5 6 3 12 9 6 7 MPGS 34 30 24 23 29 18 19 23 20 a.) Calculate rand at a=0.05, determine if there is significant linear correlation. b.) If there is correlation, calculate the regression line. If not, skip this step. c.) Predict the MPGs of a 4-year-old car. d.) Find a 95% prediction interval for c.)