a. An old wisdom in tennis holds that if your first serves are always good, you are not hitting them hard enough. An analogous statement in business might be that if you have no uncollectible accounts, you probably are not selling enough on credit. Comment on the validity and parallelism of these statements.

b. When are more uncollectible accounts better than less uncollectible accounts?

C. When is a higher percentage of uncollectible accounts better than a lower percentage?