Please answer all parts

Consider the control chart based on control limits #, = + 2.656/vn. (Round your answers to two decimal places.) USE SALT (a) What is the ARL when the process is in control? ARL = (b) What is the ARL when n = 4 and the process mean has shifted to u = My + o? ARL = (c) How do the values of parts (a) and (b) compare to the corresponding values for a 3-sigma chart? in control ARL = shifted ARL = O The ARL value for an in-control process is smaller for the 3-sigma chart. O The ARL value for an out-of-control process is smaller for the 3-sigma chart. O Both ARL values are smaller for the 3-sigma chart. O The ARL value for an in-control process is larger for the 3-sigma chart. O Both ARL values are larger for the 3-sigma chart