This is the elevation

321
can a figure on 3 hit a figure on 1 (the figure on 3 is in the rim) and the other is in clear terrain on 1

No, elevation 2 blocks LoF.

And if the guy is just like this
31 can level 3 hit level 1?

Edit - (This is a replay to the original post) No and don't try to apply any real world logic to it. If there's an intersecting elevation level between you and your target, LoF will be blocked.

Yes, to the question directly above.

Can you give me the rule book please because i need a paper and really really really is hard to read the RIM part in the core book page 14, is too hard for my english understood

The bold part is what you're looking for.