Richard is working on his computer which suddenly shuts down. He tries to press the power button but still the computer does not start He tries everything but there is no change. He goes to a computer shop for the repair of the computer. If you were the computer technician what is the first step you should do? a. Check the power supply using multi-tester b. Troubleshoot the internal parts of computer C. Test the integrity of circuit and the quality of electricity using multi-meter d. Check the wire of the computer​