A fluid follows the following modified van der Walls Equation of State: (P+V2a)=VbRT where =T1. The constants a,b are given by the equations: a=6427Pc(RTc)2 and b=81PcRTc. Calculate the acentric factor of the fluid. Round your numerical answer to three decimal digits. (Hint: Start with an initial guess for Pr=0.02 )