suppose that in eight months world university services of canada requires $100,000 to buy trucks. it plans to raise these funds by making monthly deposits into a bank account. over the period, the stated annual interest rate changes: it is 9 percent for first three months, and 12 percent for the next five. if the first four deposits are of $10,000, calculate the constant deposit needed for each of the next four months in order to raise the $100,000

最后结果是14241，高人可以给我讲一下这个结果是怎么得到的吗