The Tri-IiL'ityr Office Equipment Corporation sells an imported copier on a franchise basis and performs preventive maintenance and repair service on this copier. The data below have been collected from 45 recent calls on users to perform routine preventive maintenance service; for each call, X is the number of copiers serviced and 'r' is the total number of minutes spent by the service person. Assume that firstorder regression model is appropriate. 4': 1 2 3 ...434445 X,:s 4 s ...s 4 s K: 2DED4E...2?E'I '4"? Summary statistics of the dataset: n = 43, 214,-: 235, 21/,- = 3493, ZLX, X)? = 33377773, 20/,- 17)2 = 7323337773, x,- EXE- 17) = 493477773, 20/,- 7'2)? = 379139399