1. An apartment building has 12 dueling units that each rent for 1,200$ per month. In the past year the building had a 100% aqupance for 5 month but for 3 month 4 dwelling units were vacant and during 4 months 3 units were vacant. What was the annual percentage rate?

1. 5%

2. 6%

3. 16.67%

4. 20%