Second one first.

You have 4 outs here (since you didn't list the suits of the flop) being 4 5's giving you the nut straight. Given there are 5 known cards and you are putting your opponent on those cards then none of your outs are contaminated so you have:

4 outs, 47 unknown cards so 4:39 or 1:9.75

Odds being given by the bet are $3:$7.25 or 1:2.417

Therefore the pot is offering about 1/4 the odds needed to make the call, so it's -EV to make it. If 2 of the flop are the same suit as yours it changes it a bit however, as long as you can be confident your opponent isn't also on a lush draw.

Also, if there was another person still to act that you are certain will also make the call then it's still -EV, as with the extra $3 in the pot you are still only getting 1:3.412, or 1/3 the odds required by your outs.

Better way of thinking about it is that if you make the same call 10 times, you will hit once and lose 9 times.

For those 10 times you will :
Win: 1 x $10.25 (assuming no further betting for simplicity)
Lose: 9 x $3 = $27 (again assuming no further betting)

Therefore your EV is -$16.75 (roughly)

Then again, I could also be wrong

For the first one, you are being asked to call $1.15 into a $1.35 pot or odds of 1:1.17, I can't see any hand you'd be against where you were essentially even money with JTs so it would be a -EV call, especially considering that AA is around 1:3 of standing up pre-flop.