A gas well in the Muddy Ridge field, Wind River basin, Wyoming, produces from a tertiary sand formation characterized by the following data: Depth = 2,122 ft Porosity = 21% Resistivity 43 2.m = R (water sample) = 3.28 22 m at 68F Formation temperature = 90F Qy (core samples) = 0.3 meq/cm a. Estimate the gas saturation assuming clean sand. b. Estimate the gas saturation using Waxman and Smits' model. c. Estimate the gas saturation using the dual-water model.