An editor may use all, some, or none of three possible strategies to enhance the sales of a book: A: An expensive prepublication promotion B: An expensive cover design C: A bonus for sales representatives who meet predetermined sales levels In the past, these three strategies have been applied simultaneously to only 2% of the com- pany's books. Twenty percent of the books have had expensive cover designs, and of these, 80% have had expensive prepublication promotion. A rival editor leams that a new book is to have both expensive prepublication promotion and cover design and now wants to know how likely it is that a bonus scheme for sales representatives will be introduced. Compute the probability of interest to the rival editor.