Part A. Control Chart X y S. Complete the Excel file by calculating the and ARL values using the following formulas. = (L-kn) - (-L-kn) ARL = 1 / ((1-)) Where is the function of the standard normal curve. Note: In Excel, the standard normal curve values are obtained using the formula = NORM.S.DIST (z, cumulative), where z are the values for which you want to obtain the area under the curve and cumulative indicates whether you want the cumulative function or the mass function. For the cumulative use a 1. Construct the graphs of and ARL. Answer the following questions. What happens to the type II error when n increases? Refer to the graph of to describe what happens. Explain your answer. What happens to the type II error when k increases? Refer to the graph of to describe what happens. Explain your answer. What happens to the ARL when n and k increase? Use the ARL chart to describe what happens. Explain your answer What happens to the value of the individual units when n and k increase? Use the ARL chart to describe what happens. Explain your answer