An unmarried taxpayer with no dependents expects an adjusted gross income of $87,000 in a given year. His nonbusiness deductions are expected to be $7000 (a) What will his federal income tax be? (b) He is considering an additional activity 12A-3 expected to increase his adjusted gross income. If this increase should be $15,000 and there should be no change in nonbusiness deduc- tions or exemptions, what will be the increase in his federal income tax