Company is considering two different mutually exclusive capital expert denture proposals. Project eight will cost $489,000$ has an expected use life of $100$ years in a salvage value of zero and is expected to increase net annual cash flow by $71800.$ Project B will cost $321,000$ has an expected useful life of $11$ years and a salvage value of zero and is expected to increase net annual cash flow by $48600.$ A discount rate of $7\%$ is appropriate for both projects. Computer net present value and probability index Of each project