in 2010, BT granted a nonqualified stock option to Ms.P to buy 500 shares of BT stock at $20 per share for 5 years. at date of grant, BT stock was trading on Nasdaq for $18.62 per share. In 2015, Ms.P exercised the option when BT's stock was trading at $31.40 per share.

a) How much income did Ms.P recognize in 2010 and 2015 becasue of the stock option?

b) compute Ms.P's basis in the 500 shares

c) what are the tax consequences of the stock option to BT in 2010 and 2015?