Arthur Wesson, an unmarried individual who is age 68, reports 2015 taxable income of $160,000 and a regular tax liability of $38,000. Arthur itemizes his deductions, and he records AMT positive adjustments of $40,000 and tax preferences of $35,000.

a. What is Arthur's AMT?

b. What is the total amount of Arthur's tax liability?

c. Draft a letter to Arthur explaining why he must pay more than the regular income tax liability. Arthur's address is 100 Colonel's Way, Conway, SC 29526?