4. (20 points) Ideal Gasses A stream of methane (M = 16 lbm/Ibmol) enters a 6 inch ID pipe with a velocity of 50.0 ft/s at 25 C and 40 psig. At a point downstream, the methane flows through an 8 inch ID pipe at 10 C and 1 atm. Determine the velocity of the gas at this point using the following steps. a. Draw a picture of your system. Label all necessary items. Include units where appropriate