URGENT: help with some Bach!!!!!

I need to learn BWV 721 to play for a funeral ASAP (unexpected death in the family). The piece is simple, so I'll just need to play it a few times slowly to learn it, but I don't know how to read the notes in the second clef (viola clef I presume). Can anyone help me??? Please if you can....I really need to know how to play the notes in that clef.

http://imslp.info/files/imglnks/usimg/c/ce/IMSLP05509-Bach_-_BGA_-_BWV_714-740.pdf

(It starts on page 20)

thank you thank you!!!!

thanks

wow reading that clef will probably be the hardest part about playing this piece lol