Michael was troubleshooting his computer and, using a power supply tester, determined that his power supply was not working properly. He has ordered a new one and expects it to arrive within two days. What step is Michael using in the troubleshooting process? a. Identify the problem. b. Establish a theory of probable cause. c. Test the theory to determine cause. d. Establish a plan of action to resolve the problem and implement the solution. e. Verify full system functionality. f. Document findings