What are the four pairs of questions in step two of the basic problem-solving procedure that are helpful to ask if the cause of a problem is unclear or unknown? What are two additional questions for each pair?​

If the problem cause is unclear,ask four sets of questions: what is involved and not,where it is found and not,when it occurs and not,and to what extent it occurs and not as well as differences between answers and associated changes.Two additional questions for each pair are (a)what is the main difference,if any,between the answer to the first question and the answer to the second question,and (b)what change,if any,caused the difference? ​