Determine the interest rate (i) that makes the pairs of cash flows shown economically equivalent. $2,000 $2,000 $2,000 $2,000 $2,000 $2,000 $2,500 $1,750 $1,225 $858 $601 $421 0 1 2 3 4 5 6 Years 1=? 0 1 2 3 4 5 6 Years The interest rate (/) that makes the pairs of cash flows shown economically equivalent is %. (Round to two decimal places.)