From the table below, draw the load vs$.$ penetration diagram, then determine the CBR value for the subgrade layer. Evaluate whether the obtained CBR value is acceptable, and provide a reason for your conclusion.

$\backslash$table$[[$Penetration $($in$),0,0\mathrm{.}05,0\mathrm{.}1,0\mathrm{.}15,0\mathrm{.}2,0\mathrm{.}25,0\mathrm{.}3,0\mathrm{.}4],[$Load $($Ib$),0,150,250,390,435,450,470,520]]$