18.aFind the duration ofa2-year bond that pays 4% coupons annually, has a YTM of5% and a face value of $1,000. b. If interest rates drop by 30 basis points, what is the expected price of the bond using the duration approximation after the drop in rates? (use a made-up duration if you didn't answer part a) c. What is the actual price of the bond after the 30 basis point drop in rates? Lformulas