solve fast and correctly especially part B

Q1) a) As a travelling agency, mention two processes that requires control. What is the type of the control for each process? [2 marks] b) Inspect the table below which consists of 10 data entries (n=5) and answer the following questions. [8 Marks] 2 10 3 4 5 6 7 8 9 10 13 10 12 10 13 10 9 9 10 12 10 10 10 11 8 11 10 11 9 12 9 8 8 10 11 10 10 8 11 12 10 8 12 10 9 10 10 8 9 12 9 i. What is the sample standard deviation? What is ? ii. If z=3, what would be the controlled variable? iii. How the control would be affected? iv. If standard deviation is unknown, what would be the control limits and what would affect the controlled variable? V. Is the system in control or not? 1 10 9 10 9 12 la 9 9 8