Davids employer, Run Hard Inc., granted him 1000 ISOs and 1,000 NSOs on January 1stof last year. The exercise price was $5 per share for both sets of options. David exercised both sets of options on July 1st last year, when the stock was worth $8 per share. David sold 400 shares acquired for the ISO grant and another 400 shares acquired from the NSO grant on April 1st this year for $14 per share. David sold the remaining shares from both the ISO and NSO grants on December 31st of this year for $20 per share.

a. How much ordinary income did David recognize when his employer granted him the ISOs and NSOs?

b. How much ordinary income did David recognize when he exercised the ISOs?

c. How much ordinary income did David recognize when he exercised the NSOs?

d. How much ordinary income did David recognize when he sold the shares acquired from the ISO and NSO grants on April 1st of this year?