i was working on this problem and I found the NPV and the IRR but I dont know how to calculate the cross-over rate..can anyone tell me how to calculate a cross-over rate?

1. Consider the following cash flows from two mutually exclusive projects below:

Calculate the NPV and IRR of each project. Next, calculate the cross-over rate, or the discount where we are indifferent between the two projects (Fisher’s Intersection). Assume a discount rate of 10%. Which project would you recommend? Be sure to draw a graph to illustrate your answer.

Project Q Project P

-$1000 -$8000

200 1200

800 3600

350 5500