Two identical triangular slotted drains will be constructed at the road section shown below. The peak flow is estimated from the following data: runoff coefficient $=0\mathrm{.}75,$ rainfall duration $=6$ mins, ARI $=10$ years. Assume that the IDF curve given below is applicable in the area. The following constants will be used in the design: g $=32\mathrm{.}2$ ft$/$s$2,100\%$ inlet efficiency, $0\mathrm{.}5$ orifice constant, and $2\mathrm{.}6$ weir constant. Considering one drain, determine the following $(20$ points$)$:

a$.$ depth of water $($in ft$)$

b$.$ water spread $($in ft$)$

c$.$ area of the slotted drain opening $($ft$2)$