please answer and work for both

3) EZy Inc. preferred stock pays a $4 annual dividend. What is the value of the stock if your required rate of return is 10% ? 4) Peterson Dune Company paid a $3 dividend per share last month. The cost of capital is 5% and the company is expected to grow at 3% per year forever. How much should be the value of the stock? If the shares are selling for $55 in the market, is it over-valued or under-valued? Should you buy it