An $8-$m wide rectangular channel carries a flow of $96$ m$3/$s at a flow depth of $4$ m$.$ The channel is constricted at a bridge crossing. Calculate the water surface elevation at the crossing ASSUMING THE CHANNEL BOTTOM IS LEVELED!! Hint: you neeed to check whether the flow is choked or not. DO NOT REFERENCE OTHER CHEGG SOLUTIONS THEY ARE INCORRECT

a$.$ The channel width is constricted to $7$ m at a bridge crossing.

b$.$ The channel width is constricted to $5$ m at a bridge crossing.