Name the subtype of equilibrium (out of thermal, phase, mechanical and chemical equilibriums) that is at play in the following situations? A) Vapor floating over the surface of a lake on a cold winter morning. (4) B) Measuring the temperature of a sick person using a thermometer. (4) C) In a game of "tug of war", two teams pulling a rope with equal force in both the direction so that the rope remains still at one place. (4)