Which of these bonds carries the highest yield

Question $6$ options:

A Pepsi Bond, expiring in $3$ years, carrying a $4\%$ coupon, being offered at $97\%$

A Yum! Brands Bond, expiring in $3$ years, carrying a $7\%$ coupon, being offered at $103\%$

A Coca$-$cola Bond, expiring in $3$ years, carrying a $5\%$ coupon, being offered at $94\%$

A A&W Bond, expiring in $3$ years, carrying a $6\%$ coupon, being offered at $100\%$