The following are field notes for an irregular cross section. Compute the

cross$-$sectional area using coordinate method. The roadway is $24$ ft wide and

side slopes are $1$:$2.$

c$5\mathrm{.}20$

$13\mathrm{.}3$

c$4\mathrm{.}87$

$7\mathrm{.}73$

c$2\mathrm{.}33$

$2\mathrm{.}80$

$3\mathrm{.}73$

c$4\mathrm{.}87$

$13\mathrm{.}28$