XYZ is considering two mutually exclusive projects called A and B. The initial cost of project A is $100000 and it generates the after tax cash flow of 15000 per year forever. The initial cost of project A is $150000 and it generates the after tax cash flow of 18000 per year forever. What is the cross over rate for project A and B if the discount rate is

10%? 9% 5% 6% 10%