A pwm dc to ac inverter uses a H-bridge with 4 switches & 4 diodes. These components are separate semiconductors located in the same package and attached to one heatsink. The semiconductors and device case (= package) have the following thermal characteristics and power losses: diode: Rjc 1.5 °C/W PD = 4 W switch: Rjc 1.2 °C/W PT = 8 W package: Rch 0.5 °C/W (b) Select a more suitable heatsink by determining the heatsink thermal resistance Rha required to limit the maximum device temperature at 65 °C when tambient 25 °C. Also give the temperature of the cooler device.