Pressure and temperature at a test port

A maintenance technician reads a gauge pressure of $86.0\,\mathrm{kPa}$ in a sealed gas chamber. Atmospheric pressure is $99.2\,\mathrm{kPa}$. A sensor also reads $48.0^\circ\mathrm{C}$ inside the chamber while a surrounding reference chamber is at $294.5\,\mathrm{K}$. Determine the absolute gas pressure, its absolute temperature and the magnitude of the temperature difference.