The paragraph below lacks unity, because one sentence wanders from the main point. Which sentence should be deleted in order to fix the problem? 1I am currently learning how hard it is to work and go to school at the same time. 2Students like me, who want to make good grades but need to pay their own way, face tremendous burdens. 3For example, I work in an insurance office thirty hours a week, so each semester I have to maintain a tight schedule that allows me to attend classes and still be at my job when needed. 4This semester has been particularly challenging: I take an early-morning math class Monday through Thursday, then rush to get to work by 10 a.m., and by 6 p.m. on Wednesdays I’m back at school for a three-hour night class in statistics. 5Much to my chagrin, my Friday work/school schedule is even more difficult than my Monday through Thursday schedule. 6Fortunately, the people at my job are very pleasant, and some of us have become good friends. 7It’s hard for me to have a job while trying to earn my college degree, but when I graduate both will make me more employable.