A couple of questions

For the peanut gallery, should they keep from making eye contact or interacting with the dogs? I noticed that for a good portion of the class our dog Gir was just starring at me, whining, and even waving his hands to me. Should I sit away from him or is there certain body language I should portray?

Is there anything that should be said to help the dog know they should be laying down (the long down)? 

What should the correction for barking, or whining be for the dog during a long down?

What if the dog follows your tight left turn, or re-positions itself to be at you right leg?

How far away should point a and point b be from one another during the longe line?

Thanks,

Angel