Please help explain and answer the mathematical modeling problem. Will rate for well-explained and correct answer. Thank you.

71.3. Suppose that the flow-density relationship was known only as a specific sketched curve. If the initial traffic density was known, how would you deter- mine where to look to observe the density po? 71.3. Suppose that the flow-density relationship was known only as a specific sketched curve. If the initial traffic density was known, how would you deter- mine where to look to observe the density po