Answer:
a. Qualified residence acquisition debt interest
b. Qualified home equity debt interest
Explanation:
Qualified residence interest deduction includes all interests on debt related to building, acquiring or improving your primary residence.
Before 2018, any interests on home equity loans were deductible, but not anymore. Only those interests on equity loans used to improve your existing home (build or remodel) qualify as deductible home equity debt interest. If the debt was taken before 2018, you can still deduct the interests even if it was used for paying college tuition, but since we are not given any dates here, we must assume it was a new debt.