Dataset: https://drive.google.com/drive/folders/1sI6xYM4sSWxdfEL5yN7OpNuqVVROaZXj?usp=sharing

1. After taking 8 samples (each sample contains 5 parts) you want to calculate the control limits of the X-bar and R charts. Use the "sample data.csv" dataset, D3 = 0, D4 = 2.115, and A2 = 0.577. What is the UCLr, LCLr, UCL Xbar and LCL Xbar respectively? (Hint: you may want to use the rowMeans function and the apply function) A: UCLr= 45.04, LCLr = 0, UCL Xbar = 56.25 and LCL Xbar = 20.5419 B: UCLr= 20.5419, LCLr = 0, UCL Xbar = 56.25 and LCL Xbar = 45.0433 C: UCLr= 56.25, LCLr = 20.5419, UCL Xbar = 45.04 and LCL Xbar = 0 D: None of the above