In March 2019, Serengeti exercised an ISO that had been granted by his employer, Thunder Corporation, in December 2016. Serengeti acquired 4,600 shares of Thunder stock for the exercise price of $90 per share. The fair market value of the stock at the date of exercise was $126 per share. If an amount is zero, enter "0". a. What is Serengeti's 2016 AMT adjustment related to the ISO? Adjustment: Amount: $ b. What is Serengeti's 2019 AMT adjustment related to the ISO? Adjustment: Amount: $ A negative adjustment A positive adjustment No adjustment