Questions About Bitlocker Clients And Pc Restore

I have been reading a bit about bitlocker and have been thinking of encrypting my computers but wanted to know more information about backups/restores. My question are the following:

1) Is it possible to backup and restore a bitlocker encrypted drive?

2) Can you open the backups on whs 2011 and get for example a specific file or you can only do full system restores?

3) does 2011 have bitlocker where you can encrypt its hard drives?

thanks in advance