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 291 313 305 306 M2 323 309 312 305 M3 277 289 315 274 M4 327 305 299 290 M5 281 301 303 284 Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits. O a. M2 O b. M3 O c. M1 Od. Process is in Control O e. M5 Of. M4 During the early morning hours, customers arrive at a branch post office at an average rate of 63 per hour (Poisson), while clerks can provide services at a rate of 21 per hour. If clerk cost is $45.58 per hour and customer waiting time represents a cost of $43 per hour, how many clerks can be justified on a cost basis O a. 8 Ob. 7 O c. 6 O d. 4 O e. 5