please solve for equivalence and show steps. the answer is NOT 146% apparently. how do you find R?

Determine the interest rate () that makes the pairs of cash flows shown economically equivalent. $3.000 $3,000 $3,000 $3,000 $3.000 $3,000 1 4 5 6 2 3 Years i = ? $3.500 $2.625 $1.969 $1.477 $1,108 $831 1 2 3 4 Years 5 6 Determine the interest rate () that makes the pairs of cash flows shown economically equivalent. $3.000 $3,000 $3,000 $3,000 $3.000 $3,000 1 4 5 6 2 3 Years i = ? $3.500 $2.625 $1.969 $1.477 $1,108 $831 1 2 3 4 Years 5 6