Question $4$: Using Earned Value Metrics to Steer a Municipal Upgrade$$ The Rooiwal Waste Water Treatment Works is being upgraded to handle more wastewater and improve efficiency. Assume you$$ve received the following financial performance data for the project: Planned Value $($PV$)$: R$500$ million Earned Value $($EV$)$: R$450$ million $$Actual Cost $($AC$)$: R$475$ million Use this information to:

$1.$Work out the Cost Performance Index $($CPI$)$ and explain what the result means in practicalterms$$

$2.$Suggest immediate steps that the City of Tshwane could take if the project is showing signs of going over budget or falling behind schedule

$3.$Describewhykeepingtrackofearnedvalueisespeciallyimportantinlargepublicprojectslikethis.