A firm is considering two projects that are mutually exclusive. The firm is unsure of its cost of capital at the moment. At what interest rate will the firm be indifferent between the two projects? Year $01234$ Project A $-20\mathrm{.}008\mathrm{.}007\mathrm{.}00.6\mathrm{.}004\mathrm{.}53$ Project B $-30\mathrm{.}00.10\mathrm{.}009\mathrm{.}0010\mathrm{.}009\mathrm{.}00$ At what interest rate will the firm be indifferent between the two projects?