#3 The following bonds all have five years of call protection. What is the maximum interest rate that will make calling the bonds profitable to the

What is the interest rate that will make calling the bonds profitable to the issuer at the end of the call protection? thank you

#3 The following bonds all have five years of call protection. What is the maximuminterest rate that will make calling the bonds profitable to the issuer at the end of callprotection?BondMaturityCoupon RateStrike PriceA10 years8%$105B10 years8%$103C15 years10%$105D20 years12%$10530 years6%$105