I want to know how to work out these three questions, thanks

Q13. An investment pays you $30,000 at the end of this year, and $10,000 at the end of each of the four following years. What is the present value (PV) of this investment, given that the interest rate is 5% per year? A) $39,614 B) $63,382- C) $79,228+ D) $95,074- Q14. What is the coupon payment of a 25-year $1000 bond with a 4.5% coupon rate with quarterly payments? A) $3.75- B) $11.25 C) $22.50+ D) $45.00 Q15. Owen Inc. has a current stock price of $15.00 and is expected to pay a $0.80 dividend in one year. lf Owen's equity cost of capital is 12%, what price would its stock be expected to sell for immediately after it pays the dividend? A) $16.00 B) $12.80 C) $16.804 D) $11.20 [Total: 30 marks: 2 marks each)