What amount should be deposited today in an investment account, which offers a return (interest) of 6% per year in the first year and 4% per year in the next 4 years, so that $1,967 can be withdrawn at the end of the year? 3, $3,993 at the end of year 4 and $6,998 at the end of year 5 and the account is zero? As you will notice, the rate i that we used is no longer fixed, in this problem you have several rates, so now you must use the factor below to give each period the corresponding rate.variable rate