Well I found a site that has the problems to which I'm doing; apparently it's Dynamic Programming:
#5, #6, #7, #10, #11. Too bad it doesn't give the answers with explanations :\. Also note that where it has a | between a box, that's really an arrow going down. On mine, the professor included arrows going to the right and diagonal ones too which was neglected here.
Thanks! Please include an explanation to the answer so I can complete the others.