13. A $1,000 par-value bond (semi-annual interest) is currently trading for $859.61 It will mature in 30 years and has a coupon rate of 12%. What is this bond's yield to maturity? answer is 14%

17. A stock just paid a dividend of $2.50 The dividend is expected to grow at 20% for three years and then grow at 5% thereater. The required return on the stock is 13%. What is the value of the stock? answer is 47.76

19. Assume you are buying a stock that will not pay you any dividends for the first 3 years. At the end of year 4, it will pay you $10 dividend, and after that, the dividend will grow with the rate of 5% forever. If the required rate of return is 10%, what is the price of this stock today? answer is 150.26

I need explations on each questions.