The power amplifier for a car stereo amplifier has a rated output power of 750 watts when operating at room temperature. Assuming a Class B amplifier with the maximum theoretical efficiency is used, find the DC power delivered to the amplifier. Find the heat energy generated by this amplifier. Assuming the BJT power transistor has a maximum junction temperature of 150 0C, if the room temperature ambient temperature is 25 0C, find the maximum allowable thermal resistance from the junction to ambient.