1. Consider the Coleman@ brand canister of propane, shown in class. This canister contains only propane, and is used to provide fuel for small barbeque grills. a) Determine the pressure (Pabs) in the canister, in psi, considering that it has never been used. State your assumptions and show your calculations. b) Determine the fraction (by mass) of propane that is in the liquid phase, and the fraction (by mass) that is in the vapor phase (again, the canister has never been used). State your assumptions and show your calculations. c) When the propane canister is being used, the propane is burned at a rate of about 250g/hr. Note that it is the gas that is burned, not the liquid, and that the outlet is at the top of the cylinder. On one graph, plot the absolute pressure (in psi) in the canister (using Excel) as a function of time (in minutes), until the flame burns out. One a 2nd graph, plot the mass (in g) as a function of time, in minutes