Question: 3. Why do we do the software testing?The following picture is about the software testing cost at each stages for three different kinds of defects,

 3. Why do we do the software testing?The following picture is

3. Why do we do the software testing?The following picture is about the software testing cost at each stages for three different kinds of defects, please explain this graph. (10 points) Requirements defect Design defect Code defect il Design 4. We have introduced the error, fault, and failure, please explain the relationship among this three terminology, and write a source code to mark where is the error happened, how the fault appear, and what is the failure caused, and also explain it. (10 points)

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