No prob,

1. Flat bottom wing: Flat on bottom, curved on top. Very stable and great for beginners to learn on.

2. Semi Symmetrical: curved on top, curved on bottom, but not as much. OK for some beginners and a little unforgiving.

3. Symmetrical: the curve on top is the same as the curve on the bottom of the wing. This wing will be totally unforgiving for a beginner pilot.

Clipped wing is a wing that is shorter than usual for the same aircraft. It increases the wing loading and can make the plane more aerobatic and less stable. I think this is something you will only see on J-3 Cubs.

I'm no rocket scientist so I'll let someone else try to type out why a wing generates lift. but it's not that difficult

Scott