Hi, please help to these questions and explain why?

7 Ch14/. Amortization of a premium increases bond interest expense, while amortization of a discount decreases bond interest expense?

S26 Ch14/. If bonds are issued initially at a premium and the effective-interest method of amortization is used, interest expense in the earlier years will be a. greater than if the straight-line method were used. b. greater than the amount of the interest payments. c the same as if the straight-line method were used. d. less than if the straight-line method were used.