4. Calculate the discounted payback period from the information given, Cost of the project - Rs. 6,00,000; Life of the project - 5 years; Annual cash inflow - Rs. 2,00,000; cut-off rate is 10%. 5. A firm's ke or Cost of Equity (return available to shareholders) is 15%, the average tax rate of shareholders is 40% and it is expected that 2% is the brokerage cost that shareholders will have to pay while investing their dividends in alternative securities. What is the cost of retained earnings? 6. Explain different factors influencing Working Capital Management