Determine the well productivity if you use 40,000 lbs of proppant with a proppant pack porosity of 0.35, specific gravity 2.6, and permeability 60, 000 md. This proppant is to be placed in a formation of thickness 65 ft and 0.5 md permeability. Assume that all the proppant is placed properly within the fracture. The drainage radius is re=2100 ft and the well radius, rw=0.328 ft and the pre-fracture skin is 5. Determine the optimal fracture propped width and length