A contaminant in water is traveling through a saturated clay layer under a hydraulic gradient of 0.15. The clay has a hydraulic conductivity of 2 x 10^(-7) cm/s, a moisture content of 19%, and a Gs of 2.65. a. estimate the time it would take for the contaminant to travel 20m. Give your answers in days and years. b. estimate how far the contaminant would travel in 5 years