ABC Ltd issued a bond with face value of N$1 000 with a coupon rate of 12% per annum. Coupon is paid annually. The expected rate of return on similar bonds is 10% per annum. Determine the value of a bond when (a) issued in perpetuity, (b) redeemable in six years' time, (c) redeemable in five years' time at a premium of 10%.