I need some help with question 8 of case 1. The book tilte is: Cases in Financial Management. Authors: John S Dunkelberg and Joseph M Sulock

B. (a) Suppose Studebaker's goal is to accumulate $400,000 in 20 years. Assume the $30,000 is invested at 8 percent. How much will he have to save in equal amounts at the end of each of the next 20 years if he can earn 8 percent per year on any investments? (b) Repeat part (a) but assume he will not be able to save any money in years 13 to 20. This is, he will save an equal amount at the end of years 1 to 12 and nothing thereafter