4 2 pts Bob's redemption proceeds from qualified savings bonds during the taxable year 2021 are $12,000 which includes a principal of $8,000 and an interest of $4,000. On the other hand, Bob's qualified higher education expenses are $10,000. How much of the interest (if any) is includable in his 2021 gross income? Round your answer to the nearest dollar, and do not include cents, commas or dollar sign. For example: if the answer is 100 simply write 100, (and NOT $100, $100.00 or 100.00)