(Keep in mind I am relatively new, so this may not be correct.)
Hand #1
FLOP - You're 4.2% to hit that 3-flush by the river. When calling bets, keep in mind you'll need to see the river in order for the percentage to be viable.
TURN - You have 9 outs (you see 3 hearts on the board, plus one in your hand, and with 13 cards per suit, there are nine left). This amounts to about 20% to hit on the river.
Hand #2
FLOP - There is no low straight draw for you here, so I assume you'll have found weakness and be looking to pair either your two or your ace on the turn. You have 6 outs or 13% to hit on the turn, and by the river about 24%.
TURN - You have 2 outs to hit your ace (4.4%) and 3 outs for your two (7%).
Here's the resource I used to determine this, see if you can't figure out the last two.
http://www.pokerupdate.com/pokerodds.htm
[I think a fairly simple rule is that if you want to hit by the river from the flop you multiply your outs by 4 and add 2 and that is your percentage, and if you want to hit by the turn from the flop you multiply your outs by 2 and add 2 for your percentage.]