$13\mathrm{.}26($Optional$-$Based on Earned Schedule discussion in Appendix $13\mathrm{.}1.$ Suppose you have a project with a Budget at Completion $($BAC$)$ of $$250,000$ and a projected length of $10$ months. After tracking the project for six months, you have collected the information in the table below.

a$.$ Complete the table. How do Earned Value SPI $($based on $$)$ and Earned Schedule SPI differ?

b$.$ Calculate the schedule variances for the project for both Earned Value and Earned Schedule. How do the values differ?

$\backslash$table$[[,$Jan,Feb,Mar,Apr,May,Jun$],[$PV $($$$),25,000,40,000,70,000,110,000,150,000,180,000],[$EV $($$$),20,000,32,000,60,000,95,000,123,000,151,000],[$SV $($$$),-5,000,,,,,],[$SPI $($$$),0\mathrm{.}80,,,,,],[$ES $($mo$.),0\mathrm{.}80,,,,,],[,,,,,,]]$