An investment of ?$64,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned? 8% interest, the second? 6%, and the third? 9%. Total interest from the investments was $5,160. The interest from the first investment was 6 times the interest from the second. Find the amounts of the three parts of the investment.
a) What is the amount of the first part of the? investment? ?$
b) What is the amount of the second part of the? investment? ?$
c) What is the amount of the third part of the? investment? ?$