just one or two sentence explinations ! thank you

Short Answers 1. Doc Rivers is trying to understand the term "cost of capital." Define the term, and indicate its relevance to the decision rule under the annual rate of return technique. 2. What are the advantages and disadvantages of the cash payback technique? 3. What is the decision rule under the net present value method? 4. El Cajon Company uses the internal rate of return method. What is the decision rule for this method