A Six Sigmа prоject teаm imprоved prоcess cаpability on a company-identified important characteristic. As part of the Control phase, the team is implementing statistical process control to monitor the process average. For the last 10 days, a sample of three parts was selected at random from production, and the characteristic was measured. The summary data is below. The company's SPC expert has recommended use of an x — R chart. Day 1 2 3 4 5 6 7 8 9 10 Average x 15.2 16.7 15.4 14.9 16.5 15.7 11.1 13.0 16.6 14.5 14.96 R 3.6 2.7 5.1 5.1 2.7 4.8 0.9 0.9 2.1 5.4 3.33 s 2.0 1.4 2.9 2.6 1.4 2.4 0.5 0.5 1.1 2.7 1.73 Round estimates to two decimal places. Estimate the upper control limit for the x chart. [xucl] Estimate the lower control limit for the x chart. [xlcl] Is the process average in control? Answer Yes or No. (Hint: You do not need to draw a chart.) [INC]