Sorry for the newb question, but I just synced my iPad before having to share it with a coworker.

I want to backup the apps I bought in case she deletes them. (I'm assuming I will get it back at some point). Sync does not do this, viewing the iPad in itunes shows no apps and no way to copy what I have...
Also, I see there's an update to install. When I go to do it, it reminds me there are purchased items I need to back up... but how to do this?
And lastly, there is a photo album I'd like to delete, but it was synced from a different computer. Any way to delete?
There are purchased items on the ipad "a*p" that have not been transferred to your iTunes library. You should transfer these items to your iTunes Library before updating this ipad. Continue?