Please answer question b

Q3. Water is flowing in a channel at a rate of Q = 30 m:/s. The critical depth x for such a channel must satisfy the equation Q? 0 = 1 B 943 where g = 9.81 m/s?, A = the cross sectional area (m?), and B = the width of the channel at the surface (m). For this case, the width and the cross-sectional area can be Eq. 1 related to depth x by: + 2 and B = 3 + x Solve for the critical depth using i 3, (b) False position with the initiai guesses of xI= 1.0 and Xu= 3. Iterate until the approximate error falls below 10%