4. The following reservoir data were estimated from subsurface maps, core analysis, well tests, and fluid samples obtained at several wells in a dry gas reservoir with water influx. Use these data with the volumetric method to calculate the gas reserve and the gas recovery factor if Sgr=35% at pa=750psia and the volumetric sweep efficiency is 60%. (25 points) pi = 2,500 psia. A=1,000 acres. zi = 0.860. Swi = 25%. pa = 750 psia. h = 10 ft. za = 0.550 Sgr = 35%. =20% T=180F Ev=60