In which sentence 'down' is used as an adjective?

Down (Adjective):
Synonym: complete, completed, concluded, done, ended, finished, over, over with, terminated, through, up.
- The window shades were down.
- The candy is down on the bottom shelf.
- These changes should help keep prices down.
- Stocks are down again today.

Down (Adverb):
Synonym: below, downward (or downwards), over
-  The land slopes down to the sea.
- She called down to her friends in the street below.
- They set the cake down on the table.
- Lay down your book for a minute.
- We watched the sun go down.
- He knocked him down with one punch.

Source: Merriam-webster Dictionary