Jackson turns 25 today. An investment her grandfather made in his name on the day of her birth is now worth $50,000. The investment has accumulated interest at 8% compounded quarterly since the original deposit. How much did his grandfather originally invest? Select one: O a. $6801.00 O b. $6901.65 O c. $6988.65 O d. $6960.64 O e. None of the above