This first exerpt is just a quick little riff by B.B., on the tune "There's Something on your Mind" (with Etta James), from his 1993 album Blues Summit. Listen to mp3 of this B.B. King tab
A simple, but classic B.B. King lick. You'll hear King play variations on this riff in virtually every solo he's ever played. Familiarize yourself with this pattern, and try to match the vibrato and bend exactly.