please answer both questions and label them, thank you.

3) A quality analyst is monitoring a pecan-filling process; she uses a sample size of five, and determines the overall process average as being six hundred and fifteen, and the average range as being sixteen. a) Calculate the upper and lower control limits for the X-bar chart. b) Calculate the upper and lower control limits for the R chart. 4) Oklahoma LED's production process yields lightbulbs with an average life of one thousand eight hundred fifty hours and a standard deviation of one hundred hours. The tolerance upper and lower specification limits are two thousand five hundred hours and one thousand six hundred hours, respectively. Is this process capable of producing lightbulbs to specification