$2.$ From the class data collectively, plot void ratio versus logarithm of effective stress. Calculate the following and show all calculations: $$ Maximum preconsolidation pressure computed using Casagrande$$s method, show all construction lines on your plot $$ Recompression index, Cr $$ Compression index, Cc $$ Swell index, Cs$,$ computed from unload portion of curve $3.$ From the class data, plot cv $($y$-$axis$)$ versus logarithm of the average effective stress $$avg $($xaxis$).$ Plot values for the loading increments only $($unloading increments should not be included$).$ Discuss how you would select a value of cv for a settlement analysis.