BKM Ch$10$ problems $3,5,12,32,37$

What would be the likely effect on a bond's yield to maturity $($would it increase, decrease, stay same, or is the

change uncertain$)$ of:

a$)$ An increase in the issuing firm's times$-$interest$-$earned ratio?

b$)$ An increase in the issuing firm's debt$-$equity ratio?

c$)$ An increase in the issuing firm's quick ratio?

A zero$-$coupon bond with face value of $$1,000$ and maturity of five years sells for $$746\mathrm{.}22.$

a$)$ What is its yield to maturity?

b$)$ What will happen to its yield to maturity if its price falls immediately to $$730?$