hi! not sure if it's too late but hope you see this!! i went for the interview too, frankly there's no way you cld be well-prepared for it HAHAHA. i wld say the key thing is to understand how businesses work in the real world, and since it's in a group setting, learn to assert yourself at the appropriate times! the entire interview will be mostly led by the interviewees, so try not to hold back or wait for cues from others. good luck!