please answer correctly and show all work for an upvote!

Due to a financial emergency, Mary had to borrow money from a less-than-reputable lender. The lender uses a Rule of 78 approach to determine how much interest will be included in each loan payment. If Mary borrowed $510 to be paid back over 2-years (24 months) what percentage of Mary's first payment was interest? 8% 31% 2% 15% e Textbook and Media Assistance Used Save for Later Attempts: 2 of 3 used Submit