For each problem, write the constraints and graph the solution set to the system of constraints. See Example 2 .
Making guitars. A company makes an acoustic and an electric guitar. Each acoustic guitar requires $\$ 100$ in materials and 20 hours of labor. Each electric guitar requires $\$ 200$ in materials and 15 hours of labor. The company has at most $\$ 3000$ for materials and 300 hours of labor available. Let $x$ represent the possible number of acoustic guitars and