You are filling a root beer mug from a keg. the pressure in the keg is 5 psig, the filling tube from the keg is 5 ft long plastic drawn tubing with ¼ in. id, and the valve is a diaphragm dam type. the tube is attached to the keg by a threaded tee, used as an elbow. if the root beer leaving the tube is 1 ft above the level of the root beer inside the keg, how long will it take to fill your mug