A CPU chip with a footprint of 3 cm by 2 cm is mounted on a circuit board. The chip generates 0.31 W/cm² and rejects heat to the environment at 28°℃ by convection and radiation. The outer casing of the chip has an emissivity of 0.88 and the heat transfer coefficient is 48 W/m².K. Neglecting the thickness of the chip and any conduction into the circuit board, calculate the chip surface temperature. (10 pts)