Benzene is held at 425 K. Find the fugacity and fugacity coefficient at: a.) Psat b.) 1 bar c.) 2 bar d.) 12 bar

Assume the benzene (species 1) from above is part of an equimolar vapor mixture with n-hexane (species 2). Find the fugacity and fugacity coefficients at 2 bar for each species if: a.) The vapor solution forms an ideal solution. b.) The vapor solution does not form an ideal solution. c.) Can the mixture be treated as an ideal solution of vapors? Why or why not?