Don't flame me because I'm a noob, I just can't seem to figure out how to zoom with the sniper scope. Not sure what buttons to use. Also in the campaign I've come across these floating coins and I can't seem to figure out how to pick them up either. I'm pretty sure I need them because at the end of the mission I see I haven't filled any of the slots. I haven't played the game much maybe 3-4 hours so I'm still trying to figure things out. Any tips would be useful.

im a noob but i did beat the game. you can also use the up on the d pad to zoom in. and you shoot the coins ang if you collect all of them in one lvl you get some gamer points. :)