I need help with 9 and 10! Thanks so much!

9. Heather purchased a five-year S4,500 bond below par value for $3,625 with a coupon of 27% (?poin) What was her yield? 32% 2.796 34% 22% 10. John's investment portfolio is shown below. What is his weighted mean ROR? (l point) Investment Amount Invested ROR Money Market Account $4,600 Govemment Bond$3,300 Preferred Stock Common Stock A$2,100 1.89% 2.6% 4.1% 1.2% $3,900 1.53% 1.35% 2.5496 2 43% 8 4 6