The data on measurement system is given below:

Part No.	Inspector 1			Inspector 2			Inspector 3
	Trial 1	Trial 2	Trial 3	Trial 1	Trial 2	Trial 3	Trial 1	Trial 2	Trial 3
1	38	39	37	34	33	34	41	40	40
2	35	35	35	41	42	43	44	44	42
3	39	38	40	39	38	39	36	38	36
4	31	29	33	29	31	27	45	47	47
5	32	32	30	26	24	24	45	47	47
6	39	41	41	36	34	38	39	39	39

Find gauge capability using Design of Experiments -

a) P/T Ratio with USL=55; LSL=20

b) Variability w.r.t. repeatability

c) Variability w.r.t. reproducibility

d) Find the variance of Part Operator

e) Find the variance of parts?