$6\mathrm{.}15.$ A catchment is to be simulated using the Clark model$-$that is$,$ by routing using a time$-$area method $($to produce hydrograph time delays$),$ followed by routing through a linear reservoir $($to produce hydrograph attenuation$).$ The time$-$area and rainfall$-$excess data are given below:

$\backslash$table$[[\backslash$table$[[$Time$],[(min)$