7. (10 points) A large chamber is separated into compartments 1 and 2, as shown in the figure below,which are kept at different pressures. Pressure gage A reads 260 kPa

and pressure gage B reads 100kPa. If the local barometer reads 100 kPa, determine: (1) the absolute pressures in the compartment (1);(2): the pressure in (2) which is the ambient pressure for pressure gage B; (3) the reading of gage C.