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

b When are more uncollectible accounts better than fewer uncollectible accounts?

c When is a higher percentage of uncollectible accounts better than a lower one?