$15.$ In each of the following financial situations, fill in the blank with the terms high duration, low duration, or zero duration, as appropriate.

a$.$ If you were considering buying a bond and you expected interest rates to increase, you would prefer a bond with a $\_\_\_$ b$.$ Relative to a bond with a high coupon rate, a bond with a low coupon rate would have a $\_\_\_\_$ c$.$ A bond with a short maturity generally has a $\_\_\_\_$ compared with a bond with a long maturity. d$.$ A $1-$year corporate bond with a $5$ percent coupon rate has a $\_\_\_\_\_$ relative to a one$-$year T$-$bill.