$1.)$ A concrete pipe $(n=0\mathrm{.}013)$ must carry $11f\frac{t^3}{s}$ of stormwater runoff from a parking lot to the

municipal storm sewer. The design drawings indicate the slope of the pipe must be $2\mathrm{.}3\%$ to ensure open

channel flow conditions. a$.)$ Determine the minimum diameter of pipe. b$.)$ Select the final design size of

the pipe if the standard concrete pipe sizes available are $15-$in$,18-$in$,21-$in$,24-$in$,$ or $30-$in$.$ Determine

the actual flow depth and flow area for the pipe diameter. Note: you must select diameter nearest the

required minimum size the will satisfy the required discharge capacity.