Please answer a and b$,$ please show work$/$formulas for how you solved.

Pharoah Corp. has five$-$year bonds outstanding that pay a coupon rate of $8\mathrm{.}9$ percent. If these bonds are priced at $$1,068\mathrm{.}86.$ Assume face value is $$1,000.($Round answers to $2$ decimal places, e$.$g$.15\mathrm{.}25\%.)$

a$.$ What is the yield to maturity on these bonds, assuming semiannual payments?

Yield to maturity:

b$.$ Assume semiannual coupon payments. What is the effective annual yield?

Effective annual yield: