In acceptance sampling under reduced inspection in ABC standard, double sampling is used with code letter J (n1= 20, c1=0, r1=4; n2=20, c2=3, r2=6) and AQL of 2.5%. Assume that a lot from product 5% non-conforming is submitted. Using Poisson Distribution compute the approximate probabilities that:
a. the lot will be accepted and still in a reduced inspection
b. the lot will be accepted and normal inspection will be instated
c. the lot will be rejected.