bui bakery has a required payback period of two years for all of its projects. currently the firm is analyzing two independent projects . project x has an expected payback period of 1.4 years and a net present value of 6100 project z has an expected payback period of 2.6 years with a net present value of 18600. which project should be accepted based on the paycheck decision rule

project x only

project z only

both x and z

neither x nor z