How to hack phon or computer ? end what is the good securite ,whats cybersecurite​

Which are steps taken to diagnose a computer problem? a) reproducing the problem and using error codes b) reproducing the problem and troubleshooting c) using error codes and troubleshooting d) using error codes and stepping functions

How do you take a green screen out of the video while editing?

Me if you do then you get 10 points and brainliest