change speed of MP3?

I’m assuming I’m being stupid, but I have been trying for hours now to slow down an imported mp3 track. It’s just a song from a CD that I want to slow down for practice purposes.
I’m using Cubase Artist 8.5

Any help would be appreciated. I’ve watched every YouTube video that had time or whatever in the header and still can’t get it done.

Thanks in advance

Open the pool and select musical mode for the file.
EDIT: Also you can change this in the info line of you have it showing…you just need to select the event first.

Change the song tempo.