Please help me answer the following question quickly. Thank you

Question 2:

A company releases a five-year bond with a face value of $1000 and coupons paid semi-annually. If market interest rates imply a YTM of 9.31% with semi-annual compounding, what should be the coupon rate offered if the bond is to trade at par? Express the answer as an APR in percentage with semi-annual compounding.

Question 3:

You have been quoted a rate of 4.2% compounded semi-annually. What is the equivalent effective quarterly rate in percentage?

Question 4:

ABC Inc has preferred stock with a price of $28.64 and a dividend of $3.67 per year. What is the dividend yield in percentage?