Suppose that the investment rates of a certain business are 1% in January, 2% in February, 5% in March and 7% in April.
Starting with an initial amount of 1000 $ at the start of January, what will be the future value by the end of April.
If the future value of the annuity at the end of April is 600 $, find the annuity level payments to be paid at the end of each month.