I have to say both of these are really tough spots, and I really don't know what to do. I'll do my best though.

Hand 1: How many hands have you played in this match? Is it only like 10 minutes in? If it's 10 minutes in or less i shove. If it has been awhile and he just doesn't seem to like fourbetting light than fold.

Hand 2: I just call the turn, there aren't many bad river cards so lets not turn our hand into a bluff