You purchase a 3.50% coupon bond that pays interest semi-annually and has a par value of $1,000. It matures in 12 years and is selling today for $958. Calculate the yield to maturity: On a spreadsheet that you email to me, show your work for this calculation using either the YIELD or RATE formula in Excel. a. 3.9427% O b.3.8786% O c. 3.5624% O d. 4.0000%