Couple of Questions Regarding SEP

Hi all , I am trying to achieve the following would greatly appreciate if you can help me out with it.

1) Is there a way via which we can make the CD/DVDs read only meaning users cannot write anything to the DVDs nor they can execute anything from DVDs in the same way we do for making USBs read only.

2) Currently I cannot make USBs ready only meaning I cannot prevent users from copying files from their USBs to desktop but I can stop them from writing to USBs.

Could you help me out ? Thanks