Determine the payback period, net present value and internal rate of return of the following projects. The cost of capital of the firm is 15%. a) An initial outlay of RM 100,000 in a cash flow of RM 20,000 at the end of year 1, RM 50,000 at the end of year 2 and RM80,000 at the end of year 3. b) An initial outlay of RM 100,000 in a cash flow of RM 80,000 at the end of year 1, RM 50,000 at the end of year 2 and RM 20,000 at the end of year 3. c) An initial outlay of RM 100,000 resulting in a cash flow of RM20,000 at the end of year 1 through 2 and RM 50,000 at the end of year 6.