Please help me solve all. This is one problem with parts. This is my second time posting this because the first person who did it only wrote compound problem and sent it to me. I would appreciate it if you helped me out

- MAT 141 - Written Finance Assignment PROBLEM 3: Three years after investing $15,000.00, a retired couple received a check for $3,375 in simple interest. Find the annual Interest rate their money earned during that time. a. What type of problem is this? (i.e. Simple Interest, Compound Interest, Annuity, etc.) (1 pt) b. What are you trying to find? (1 pt) c. What formula should be used? (1 pt) d. What variable are you solving for? (1 pt) e. Solve the problem and show all of your work: (1 pt) f. Interpret your work and write the answer using a complete sentence: (1 pt)