Mark received 30 ISOs (each option gives him the right to purchase 5 shares of Hendricks Corporation stock for $15 per share) at the time he started working for Hendricks Corporation five years ago when Hendricks' stock price was $15 per share. Now that Hendricks' share price is $53 per share, he intends to exercise all options and hold all of his shares for more than one year. Assume that more than a year after exercise, Mark sells the stock for $53 a share. (Round your answers to the nearest whole dollar amount. Enter all amounts as positive values.) a. What are Mark's taxes due on the grant date, the exercise date, and the date he sells the shares, assuming his ordinary marginal rate is 30 percent and his long-term capital gains rate is 15 percent? Taxes Due Grant date Exercise date Sale date b. What are Hendricks' tax consequences on the grant date, the exercise date, and the date Mark sells the shares assuming its marginal tax rate is 25 percent? Tax Benefit Grant date Exercise date Sale date