Exercise 12-21 (Algorithmic) (LO. 2) Compute the 2017 AMT exemption for the following taxpayers If an amount is zero, enter "o Click here to access the exemption table. a. Bristol, who is single, has AMTI of $144,600. His AMT exemption is b. Mariey and Naila are married and file a joint tax return. Their AMTI is $450,800. Their AMT exemption is