Hand 1: At least J8, the reason obviously being this is a standard spot and while he's tricky, i just doubt he's has a huge bluffing frequency here.

Hand 2: Wow i just have no idea what he could possibly be thinking here, it just doesn't make sense for him to have a big hand so unless he's thinking on level 224756 (well probably around 3 or 4) I say JJ+, AK. I may look at this hand later and change my mind but right now this is my assesment.