Calculate z and v for ethane at 50c and 15 bar by the following: a) the truncated virial equation � = #$ %& = 1 + ) $ + * $+with the following virial coefficients b=156.7 cm3/mol and c = 9,650 cm6/mol2 b) the truncated virial equation � = #$ %& = 1 + )# %& with a value of b from the generalized pitzer correlation �- = �. + ��0 c) the redlich kwong equation d) the soave redlich kwong equation e) the peng robinson equation