a firm must choose between two mutually exclusive projects, a & b. project a has an initial cost of $10000. its projected net cash flows are $800, $2000, $3000, $4000, and $5000 at the end of years 1 through 5, respectively. project b has an initial cost of $14000, and its projected net cash flows are $7000, $5000, $3000, $2000, and $1000 at the end of years 1 through 5, respectively. at what cost of capital would the firm be indifferent to the two projects (i.e. be willing to choose either one)?

3.47%

6.58%

6.82%

7.66%

7.18%