3.1 The Johnson Company is considering the following mutually exclusive projects: Investment Cash flow N Project J $48,000 20,000 5 Project K $60,000 12,000 15 Project L $60,000 16,000 10 Project M $36,000 10,000 15 The cost of capital used by the Johnson Company is 16%. a) How should the fact that the projects have differences in scale be taken into consideration? b) Rank the projects, assuming that they can be repeated with constant scale replication, and that the differences in scale are invested at the cost of capital