A1: You rappel down,then cross over,when the guy comes to investigate,you can shoot him and the dog or just do the dog when he goes,then you can do him or sneak past him and the other guy!then theres one at end of tunnel near the truck,you can sneak past him,and climb wooden slats just left of cave exit..

A2: Grapple down to a ledge,you then lean to climb out,go down the frame,climb in then wait,if the dogs barking a guard will come wait till he goes and then shoot the dog.grapple down again into the water towards the dead dog climb up the frame,shoot out the lamp.through the cave there are 2 guards.whistle for one he will investigate grab him and knock him out.the other one patrols by the lighted bin,take him out,at the bottom of the cave is another guard wait till he goes near the truck,turn left at the cave entrance and climb up the wooden slats.
meet your contact..