Gerry owns a home and has a $ 168,000 mortgage related to his purchase of the residence. When his daughter went to college in the fall of 2021, he borrowed $ 30,000 through a home equity loan. The interest expense on the main mortgage is $ 16,000, and the interest expense on the home equity loan is $ 1800. How much of the interest is deductible as an itemized deduction? Question options: 1) 17,800 2) None can be deducted 3) The mortgage interest has to be prorated 4) 1,800 5) 16,000