Mark received 17 ISOs (each option gives him the right to purchase 30 shares of Hendricks Corporation stock for $29 per share) at the time he started working for Hendricks Corporation five years ago when Hendricks's stock price was $29 per share. Now that Hendricks's share price is $38 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 $38 a share. (Round your answers to the nearest whole dollar amount. Enter all amounts as positive values. Leave no answers blank. Enter zero if applicable.) Problem 12-32 Part a 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