Use the Rational Method to size storm pipes $2($only$).$ The storm pipes and sub$-$watersheds detail are given in the sketch and table below. Use $n=0\mathrm{.}02$ for all pipes and the given IDF curve. Use a $100-$year frequency storm, but assume frequency factor of $1.$

$\backslash$table$[[\backslash$table$[[$Sub$],[$watershed$]],$Area$($ac$),$Tc$($min$),$C$],[1,2,2,0\mathrm{.}6],[2,5,6,0\mathrm{.}9],[3,2\mathrm{.}5,5,0\mathrm{.}4]]$

$\backslash$table$[[$Pipe$,$Slope$(\%),$Length,Diameter$($ft$)],[1,1,400,2],[2,2,300,],[3,0\mathrm{.}8,800,]]$