Missed by one question the Utah PLM exam. Going to set up a appointment for next available time at Pearson Vue.

Here is another question I do not understand

Edna is purchasing a four-unit investment property and is getting an ARM; the terms of the loan will be 3/6mo ARM with 1/1/5 CAP with a start interest rate of 4.25% and a margin of 2.25%. At the first adjustment, the index is 2.50%, at the second adjustment the index is 3.25%, and at the third, the index is 4.125%. What will the interest rate be at 18 months after the initial interest rate adjustment?