Did they start righ out if high school? Did they finish in four years? You know these details. You work it out.
Depends on how long it took them.
It depends on what age they were went the started college.
34 or 35... only if you enter college right after high school.
It depends on how dumb they are.
22 is the average age of graduating, so he/she'd be about 42, 43. But that's assuming it was 4 years of college.
Did they flank?