4. The Manning equation can be written for a rectangular open channel as Q VS(BH)5/3 n(B + 2H)2/3 = = where Q= flow [m/s], S = slope (m/m), H=depth [m], and n= the Manning roughness coefficient. Solve this equation for H given Q = 5, S = 0.0002, B = 20, and n = 0.03. Use the frero MATLAB function to determine your answer. =