Could you please, help to solve this problem? thank

P3.14 The open tank in the figure contains water at 20C. For incompressible flow, (a) derive an analytic expression for dh/dt in terms of (Q1, Q2, Q3). (b) If 4 is constant, determine V2 for the given data if Vj = 3 m/s and Q3 = 0.01 m?/s. | Q,= 0.01 m3/s D,=7cm Water