BROOKVILLE - For the 2,500 students who graduated from C.W. Post today, the sluggish economy may mean a rough job market. One graduate told News 12 Long Island she would be seeking a job out of state since she couldn't find jobs in New York, while another said despite her concerns, she was hopeful her aspirations would come true. The unemployment rate in Nassau County is 6.6 percent and it is 7.5 percent in Suffolk, both under the statewide average of 8 percent. Professor James Freeley suggests graduates look for jobs in small- and medium-size companies, some of which are growing by up to 15 percent and seeking more employees. Janet Mullen, of Bayville, lucked out with perfect timing, however, as she was offered a job today in the Port Washington School District.