Question $2$: $)$ Consider a leaky confined aquifer as shown in the figure below. The water table in the source bed is horizontal at an elevation $60m$ above the top of the aquitard. The piezometric surface for the confined aquifer slopes down linearly in the flow direction as shown. Vertical hydraulic conductivity of the aquitard is $4\mathrm{.}210-6\frac{m}{s}$ and its thickness is $25m.$ Compute the total rate of leakage per unit width into the aquifer between the flow section $x=0$ and $x=600m.$