Q10,(10 pts) Using the drilling data (a) Find the least-squares regression line. (b) Predict the drilling time if drilling starts at 130 feet. (c) Is the observed drilling time at 130 feet above, or below, average. (d) Draw the least-squares regression line on the scatter diagram of the data. Depth at Which Time to Drill Drilling Begins, x 5 Feet, y (in feet) (in minutes) 35 5.88 50 5.99 75 6.74 95 6.1 120 7.47 130 6.93 145 6.42 155 7.97 160 7.92 175 7.62 185 6.89 190 7.9