Consider an air basin with only two consumers, Huck and Matilda. Suppose Huck's demand for air quality is given by \(q_{\mathrm{H}}-1-p\) where \(p\) is Huck's marginal willingness to pay for air quality. Similarly, Matilda's demand is given by \(q_{M}=2-2 p\). Air quality can be supplied according to \(q=p\) where \(p\) is the marginal cost of supply.

a. Graph the aggregate demand for air quality along with individual demands.

b. What is the efficient amount of air quality?