Record and playback speed

I have an mp3 and can slow down the playback speed in windows media player but I want to be able to copy it onto a cd at the slow speed. I’m learning to play guitar and want to be able to take the slowed down copy to my music teacher for instruction, can I copy at the slow speed if so how do I do it.
thanks ollie

I would load the file up in Audacity and use the “change tempo” tool to stretch it out.

Then export it to a .wav and burn that as an Audio CD.