During the current year, Yoon earned $10,000 in interest on corporate bonds and incurred $13,000 of investment

Question:

During the current year, Yoon earned $10,000 in interest on corporate bonds and incurred $13,000 of investment interest expense related to the bond holdings. Yoon also earned $5,000 interest on private activity bonds that were issued in 2013 and incurred interest expense of $3,500 in connection with the bonds.
a. How much investment interest expense can Yoon deduct for regular income tax purposes for the year?
b. What AMT adjustments and preferences arise as a result of the private activity bond interest income and expense?