What is the vapor pressure at 20°C of an ideal solution prep…

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.60 g of the nonvolatile solute urea, CO(NH2)2, to 50.2 g of methanol, CH3OH?  The vapor pressure of pure methanol at 20°C is 89.0 mmHg. Assume that Raoult’s law applies. a. 4.15 mmHg b. 76.0 mmHg c. 81.5 mmHg d. 84.9 mmHg e. 13.0 mmHg