Consider the following projects and assume an opportunity cost of capital of 12%. Cash Flows Project A B C Co C1 C -20,000 45,000 15,000 -10,000 15,000 30,000 -10,000 15,000 25,000 a. Calculate the Net Present Value (NPV) of each project. Which is to be preferred and why? (8 marks) b. If there is a capital constraint in place which limits spending to 10,000, which project or projects should be selected? Support your answer with calculations.