Burt, the CFO of Amber, Inc., was granted incentive stock options in 2011. Burt exercised the options

Question:

Burt, the CFO of Amber, Inc., was granted incentive stock options in 2011. Burt exercised the options in February 2016, when the exercise price was $75,000 and the fair market value of the stock was $90,000. Burt sold the stock in September 2018 for $150,000. What are the regular income tax and AMT consequences for Burt in:
a. 2011?
b. 2016?
c. 2018?