Samples of a cast aluminum part are classified on the basis of surface finish (in microinches) and edge finish. The results of 100 parts are summarized as follows: Let A denote the event that a sample has excelent surface finish, and let B denote the event that a campie his coceliment rme finih. Determine the number of samples in each of the following events (a) AB (b) n2= (c) AB=