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 51 60 53 53 M2 56 57 59 58 M3 55 53 58 55 M4 55 60 58 52 M5 56 54 58 57 Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits. O a. M3 O b. M2 . Process is in Control O d. M1 O e. M5 O f. M4