Consider the flow of water through a 12-ft-wide unfinished-concrete rectangular channel with a bottom slope of 0.5^{circ}. If the flow rate is 300 ft^3/s determine if the slope of this channel is mild, critical, or steep. Also, for a flow depth of 3 ft, classify the surface profile while the flow develops.
a. Steep, M1, Steep
b. Critical, M2, Steep
c. Mild, M3, Mild
d. Steep, M3, Critical