Which one of the following statements Is true conceming the duration of a perpetuity? The duration of a perpetulty cannot be calculated. The duratlon of a 15% yleld perpetulty that pays $100 annually Is equal to that of 15% yleld perpetulty that pays $200 annually. The duratlon of 15% yleld perpetulty that pays $100 annually Is longer than that of a 15% yleld perpetulty that pays $200 annually. The duration of a 15% yleld perpetulty that pays $100 annually Is shorter than that of a 15% yleld perpetulty that pays $200 annually.