a. Construct the control charts for the mean and the range, using the criginal 15 samples. Set up the R-chart by specifying the center line and three-sigma control limits below. (Enter your responses rounded fo wo docimal places.). R-chartUCLR=23.12R=10.93]LCLR=07 Set up the x-chart by specifying the center line and three-sigma control limits beiow. (Enfor your responses rotinded fo two decimal places.) b. On the control chats developed in part (a), plot the vabjes frem somples fo through 25 and comment on whether the process is in control. Choose the coireot R-chart for the data below, Tho entire process is control. c. In part (b). if you concluded that the process was out of control. would you attribute it fo a dritt in the mean, or an increase in the variability, or both? The process varabily in statisbeak control and the process average is stabistical control. Therelore, the entire process is The Monmy Pi Morfgage Compary is interested in monitoring the perfortrince of the mortgaje process. Fifteen samples of five completed mortgage transactions ench wene take during a period when the process was believed to be in control. The times to complete the transactions were measured. The means and ranges of the mortgoge process trarsact times. measired in dayz are as follows: Sutsequently, samples of size 5 wore token from the process every wook for the next 10 weeks. The times were measured and the following results obtainad: Cick the icon to vew the table of foctons for calculating tureesigma limts for the x-chart and Rechart. a. Constrict the control charis for tive mean and the range; 4 ting the original 15 samples