Answer: $92,000
Explanation:
Given : Each semester he must pay $25000 in tuition and fees.
Total number of semesters in 4 years = 8 [2 in each]
Then, the total fee for 4 years will be:-
4 x Each semester's tuition and fees
=


Since , he saved $8,000 prior to starting college.
Then, the amount of debt Greg will be : Total fee for 4 years - saved money
=

Hence, Greg will be debt $92,000 in if he graduates in 4 years.