A Quality Analyst wants to construct a control chart for determining whether five machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, four units of putputs from each machine are collected: Machine Measurement 1 Measurement 2 Measurement 3 Measurement 4 M1 50 59 53 51 M2 57 58 54 51 M3 51 55 56 59 M4 57 51 58 50 M5 50 56 57 52 Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits. a. Process is in Control b. M4 C. M5 d. M2 e. M1 f. M3