The BOD of EFG corporation is faced with the following two mutually exclusive investment opportunities. Year 0 1 2. 3 4 X cash flow -50000 25,000 20,000 10,000 10,000 Z cash flow -175000 20,000 60,000 70,000 120,000 Using the NPV criterion, decide what the EFG corporation should do. The cost of capital is 12%. EFG should invest in project X EFG should invest in project Z EFG should not undertake either project. EFG should invest in both project X and project Z