A small municipal wellfield is to be developed in an unconfined san aquifer with a hydraulic conductivity of 50 m/d, saturated thickness of 40 m, and specific yield of 0.2. A service demand of 60 L/s is required from the wellfield, and the diameter of each well is to be 50 cm. If the drawdown in the aquifer is not to exceed 3 m when the wellfield is operational, develop a proposed layout for the wells