STOP!
You need to indicate what YOU THINK the answers are for each of these question you posted ... then someone here will be able to help you.
Also, if you are going into the field of education, this kind of thing should be absolutely under control by now. Study this: http://grammar.ccc.commnet.edu/grammar/sv_agr.htm
Which is the correct form of the verb provided to correctly complete the sentence.
A high percentage of student population in the College of Health and Behavioral Sciences _____ planning to obtain an internship in the hospital while completing their degree.
1)is
2)are
3 answers
are
are