[LO 5.4] Edward is single with income that places him in the 35 percent marginal tax bracket for ordinary income and 15 percent for long-term capital gains. He incurs interest expense of $10,000 attributable to his investment in stocks and bonds. His gross investment income is $6,200 ($1,000 of which is from long-term capital gains and dividends) in 2018. a. What are Edwards options in determining his deduction for investment interest expense? Explain. b. What happens if he cannot deduct all of the investment interest expense in the current year?