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A mixture of n-heptane and n-hexane containing 25 mol% n-hexane is vaporized at a pressure of...

A mixture of n-heptane and n-hexane containing 25 mol% n-hexane is vaporized at a pressure of 100kPa. Determine the following
a)The bubble point temperature
b)The composition of the vapor

The vapor pressures are given by the Antoine equation:

lnP*= A-(B/T-C)

Where P is in kPa and T is in K. The Antoine constants are given as follows:
n-heptane: A=13.8587,B=2911.32,C=56.51
n-hexane:
A=13.8216,B=2697.55,C=48.78
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