Question #$4-$ A recovery well is pumped at a rate of $12\frac{m^3}{d}$ from a confined aquifer having $T=1\mathrm{.}5\frac{m^2}{d}.$ The regional hydraulic gradient has a value of $0\mathrm{.}004.$ Calculate the distance $($a$)$ from the recovery well to the stagnation point, $($b$)$ the width of the capture zone at the recovery well and $($c$)$ the far$-$field maximum width of the capture zone. What effect would a doubling of the regional hydraulic gradient have on the values calculated in $a,b$ and $c$ above?