How do you calculate the required rate of return of a project?

If a project’s initial cost is 100 million dollars and the required rate of return is 10 percent and in three subsequent years the cash inflow is as follows: Year one= 20 million dollars. Year two= 50 million dollars. Year three= 40 million dollars and we know that the financing cost is 2% a CFA would need to know the NPV and to determine if the project should be accepted or rejected. Keep in mind that a CFA is a charter financial analyst and NPV refers to net present value. The net present value would be -10.44 and the project should be rejected.