A young listed company developing drugs for neurological diseases. So far the company has not shown any sales due to the typically long lead times to produce medicines. The market now is on is volatile, its beta value = 2 , the access to capital is uncertain in the long term and patents are important. The company is considering either use the payback method or discounted cash flow analysis or a combination of both to evaluate competing investment alternatives. Discuss and justify which of these three options the company should rely on when to make investment decisions