The per-week demand for use of the Golden Gate Bridge in San Francisco isP= 13 - 0.15Qduring peak traffic periods andP= 10 - 0.1Qduring off-peak hours, whereQis the number of cars crossing the bridge in thousands andPis the toll in dollars. If the marginal congestion cost of using the bridge isMC= 5 + 0.2Q, what is the optimal peak load toll for crossing the bridge?

PLEASE SOLVE CAREFULLY

6.5.

8.0.

8.7.

9.9.

10.5.