show formulas and work please... if using excel include formulas!!! no financial calculator plugins!

29. (0.3 point) A bond will pay $80 in interest at the end of each of the next three years, plus $1,000 at the end of the third year. If it has a present market price of $950, its yield-to- maturity is: (a) 8.5%. (b) 9.4% (c) 108. (d) 108.58. 30. (0.3 point) A bond will pay $70 of interest at the end of each of the next three years, plus $1,000 at the end of year three. If the present market price is $1,040, its yield-to-maturity is: (a) 5.5%. (b) 4.98. (c) 6.48. (d) 6.8%