(q15) describe an example in which absolute denial of service to a user (that is, the usergets no response from the computer) is a serious problem to that user. describe another example where 10 percent denial of service to a user (that is, the user’s computation progresses, but at a rate 10 percent slower than normal) is a serious problem to that user. could access by unauthorized people to a computing systemresult in a 10 percent denial of service to the legitimate users? how?