$1$ Problem $1(30$ pts$)$:

The unit hydrograph $($for one$-$hour rain duration$)$ is shown in the figure below

Figure $1$: Unit Hydrograph

Calculate the peak$-$flow time and rate as a result of rainfall with the following excess rain hyetograph:

$\backslash$table$[[$time interval,intensity$],[0-1,0\mathrm{.}4$ in$],[1-2,1$ in$]]$

Table $1$: Problem $1$

Hint: Calculate the total hydrograph. Using Excel is allowed.