Accu-Copiers, Inc., sells and services the Accu-500 copying machine. As part of its standard service contract, the company agrees to perform routine service on this copier. To obtain information about the time it takes to perform routine service, Accu-Copiers has collected data for 11 service calls. The data are given below Number c Number of Minutes Required, y Service Call 109 58 138 189 1 37 82 4 103 134 10 112 11 154 A. Find the least squares point estimates bO and bi on the computer output and report their values. Interpret bo and bi. Does the interpretation of bO make practical sense? B. Use the least squares line to compute a point estimate of the mean time to service four copiers and a point prediction of the time to service four copiers on a single call. C. Find the explained variation, the simple coefficient of determination, and the simple coefficient of correlation. Interpret the r2. D. Calculate the mean square error and standard error of this