Cubase 5 Help- Stereo to Mono

I have created a song, but 4 of the tracks are stereo, and only coming out of the left speaker. The rest of the tracks are mono, so those instruments come out of both speakers. I am wondering if there is a way to convert the stereo tracks into mono tracks, or if there is another way to make sound come out of both sides. Thank you!

More info required. Are your tracks MIDI? Audio? Some screen shots would be useful, especially of the main section of the inspector on one of the tracks that is panned.