Hello! I'm having trouble with this warm-up problem. Any help is greatly appreciated!

You may.r need to use this table to answer this question. A process sampled 20 times with a sample of size 8 resulted in = 24.5 and E = 1.8. Compute the upper and lower control limits for the ; chart for this process. [Round your answers to two decimal places.) Compute the upper and lower control limits for he R chart for this process. (Round your answers to two decimal places.)