Solve with detailed explanation please, thanks a lot!!!

> 1. What is the present value of a cash flow if 16,000 yuan will be received in 2 years and the discount rate (interest rate) is 10%? > 2. What is the present value if the discount rate is 4%? > 3. What is the price of a stock if the next dividend is 100 yuan, the cost of capital R is 10% and the growth rate is 6%? What is the price of the stock if the growth rate is 8%? Use the model , Price = D1/(R-9). What happens to the stock when the growth rate increases ? > 4. A firm increases the dividend from 100 yuan to 120 yuan, the cost of capital is 10% an the growth rate is 6%. What should happen to the stock price