Given the following cash flows for project A and project B: Year 0 1 2 3 4 Project A -15000 4000 2000 7000 5000 Project B -17000 5000 2000 7000 6250 Which of the following statement is correct? O a. The crossover rate of the two projects is 4.6%. O b. The crossover rate of the two projects is 7.0% O c. The crossover rate of the two projects is the mean of the IRRs of the two projects Od. The crossover rate of the two projects is higher than the IRR of the project with the lowest IRR of both projects. Oe. The crossover rate of the two projects is 6.8%