4) For each of the following pairs of Treasury securities (each with $1000 par value), identify which will have the higher price:

a. A four-year zero-coupon bond or a six-year zero coupon bond?

b. A four-year zero-coupon bond or a four-year 5% coupon bond?

c. A two-year 4% coupon bond or a two-year 5% coupon bond?