Selma and Patty Bouvier are twins and both work at the Springfield DMV. Selma and Patty Bouvier decide to save for​ retirement, which is 35 years away.​ They'll both receive an annual return of 11 percent on their investment over the next 35 years. Selma invests $2,500 per year at the end of each year only for the first 10 years of the​ 35-year period—for a total of $25,000 saved. Patty​ doesn't start saving for 10 years and then saves $2,500 per year at the end of each year for the remaining 25 years—for a total of $62,500 saved.

a. How much will each of them have when they​ retire?
b. How much will Selma have when she​ retires?