$19]$ A project manager is analyzing the cost variance of a construction project. The budgeted cost of work scheduled $($BCWS$)$ is $$500,000,$ the actual cost of work performed $($ACWP$)$ is $$450,000,$ and the budgeted cost of work performed $($BCWP$)$ is $$480,000.$ Calculate the Cost Variance $($CV$),$ Schedule Variance $($SV$),$ Cost Performance Index $($CPI$),$ and Schedule Performance Index $($SPI$).$ Provide a detailed explanation and set up the calculations in Excel. $[$ SOLVE THE QUESTION USING EXCEL $]$