For those who think the niners should trade down (or up), remember it takes two, who is willing depends on how desperate the team wants a player and whet they have and what they are willing to give up in the future and how much a team is willing to give up that future.
http://www.nfl.com/news/story/0ap3000001105906/article/2020-nfl-draft-whenhow-to-watch-every-pick-for-all-32-teams