bubble and dew

this problem seeks the solution to four problems associated with bubble and dew points pressures and temperatures for a 0.4 molar mixture of pentane in octane. The {x} indicates that the concentrations are liquid and the {y} indicates the compositions are vapor. When iterations are necessary, clearly show intermediate values and the convergence criteria that you used.   You may assume the Antoine equation applies for saturation pressures.  These four parts are to be solved with a calculator rather than with CHEMCAD or EXCEL.