(1) Suppose a process performs at 4.2 sigma quality level with 1.8 sigma off-centering. Provide detailed procedures to calculate the dpmo of the process (by focusing on the right-tail area). (2) Consider two processes A and B that are both centered processes with the same design specifications. Suppose process A is a 3 sigma process, and process B is a 5 sigma process. Let A and B denote the standard deviations of process A and process B, respectively. Please prove/argue (mathematically) that A > B.