Question number 5 is talking about a public four-year college. So we know this:
2000-$3,500
2001-$3,700
2002- ?
2003- ?
2004-?
2005-$5,100
Repeating exercise 1-4 it is talking about private four-year college. So we know this:
2000-$16,200
2001-$17,300
2002- ?
2003- ?
2004- ?
2005-$20,100