1 (b) Compare the merits of the net present value (NPV), internal rate of return (IRR) and discounted payback period methods of capital investment project appraisal, assuming the firms objective is to maximise the wealth of its equityholders. What conditions must apply for the net present value (NPV) and internal rate of return (IRR) methods to always give the same signal to accept or reject a capital investment project? (210 words)