Check out this link.
http://takelessons.com/blog/piano-pop-songs-for-everyone-z06
Also songs from movies or plays are also good.
Answer:
2. 1 + 2 + 3 1 2 3 + 1 + 2 3 + 1
3. 1 2 3 + 1 + 2 + 3 1 + 2 + 3 + 1 2 + 3
Explanation:
the three four time signature indicated there are only three beats in the measures.