A confined aquifer has a thickness of 10.0 m and a transmissivity of l 30 × LO- 3 m2/sec. When a 30-cm-diameter well is pumped at the rate of 30 m3/ hr, the drawdown in the piezornetric surface at the well is 15.0 m when it is not impacted by an aquifer boundary. If an identical well is installed in the same aquifer, but located 60 m from a fully penetrating river, what is the drawdown at the well, the boundary, and halfway between the two points?