Nine bond certificates of $10 000 each paying 4% bond rate with interest payable semi-annually and redeemable at par are purchased 8.5 years before the maturity date. Find the discount or premium if the bonds are bought to yield 6% compounded semi-annually Select one: a. Bond are bought at par $90,000 b. Bond are bought at a discount of $78,150.49 c. Bond are bought at premium of $11,849.51 d. Bond are bought at a discount of $11,849.51