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 Measurement Measurement Measurement 1 2 3 4 M1 31 33 35 35 M2 34 31 33 32 M3 35 32 33 32 M4 34 34 34 31 M5 34 36 35 36 Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits. a. M5 b. M3 C. M2 d. Process is in Control O e. M1 O f. M4