The room in Figure 4 contains moist air at the dry-bulb temperature and relative humidity shown. The total pressure and the saturation pressure of water at 32 °C are given on the figure. Take R = 0.287 kJ/kg·K for dry air and h = 1.005t + ω(2500 + 1.88t) kJ/kg dry air. Determine (a) the specific humidity of the air (in kg/kg dry air), (b) the mass of water vapour in the room (in kg) and (c) the specific enthalpy of the moist air (in kJ/kg dry air).