9. BUSINESS For maximum efficiency, a factory must have at least 100 workers, but no more than 200 workers on a shift. The factory also must manufacture at least 30 units per worker.
a. Let x be the number of workers and let y be the number of units. Write four inequalities expressing the conditions in
the problem given above.
c. List at least 3 possible solutions.
b. Graph the systems of inequalities.