1 An industrial electronic switching device in an electric vehicle (EV) prototype has two identical MOSFETs that share current equally. The thermal resistances are as follows: Junction to case: 1.2 C/W; case to heat sink: 0.3 *C/W; heat sink to ambient air: 0.75 C/W. This EV has recently been deployed to drive in London for an exhibition, whereby the temperatures soars to 3C. 3.1.1 Sketch the thermal equivalent circuit for the combination (2). 3.1.2 Determine the maximum power that can be safely dissipated by each device (3). 3.1.3 Determine the heat sink temperature when this EV is comes to Johannesburg where the temperatures is 25C (3).