Elbows

Hey everybody!! Just a few questions about your elbows! 1. During the freestyle recovery, how high do you need to have your elbows? some say 90 degrees to your shoulder at the height...but watching the Olympics and the SCM World Championships...It looked like they had their elbows a lot lower. 2. During the underwater pull on backstroke, do you bend your elbows or not? I dont' because sometimes it hurts the inside of my elbows and I feel like I get a better pull going straight back. 3. During the butterfly recovery, do you bend your elbows or not? I've seen people with little to none and people who almost drag their fingertips. Thanx to everyone for all your help!! ~Kyra