Please solve this A, B & C. I am really confused so if you could be as detailed as possible in the excel charts. If you could explain the formulas so I can't learn that would be great. Thank you so much.

Problem 1: (10 points) Auto pistons at Wemming Chung's plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Day 1 2 3 4 5 Mean (mm) Range (mm) 156.9 4.2 153.2 4.6 153.6 4.1 155.5 5.0 156.6 4.5 a) What are the UCL x and LCL x, using 3o? Plot the data. b) What are the UCL R and LCLR, using 30? Plot the data. c) Is the Process in Control