Use the following information on zero-coupon bonds for the question:

Maturity	1	2	3	4	5
Price (per $100 face value)	94.52	89.68	85.40	81.65	78.35
YTM	5.8	5.6	5.4	5.2	5.0

If you plot the zero-coupon yield curve for the first five years, what would the slope look like? What does it mean? Be brief.