Question 1112894
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I respond in the same "telegram" style:


3 and 4.



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For your info:


It is commonly accepted among educated people to put their question to the post, when they ask tutors for help.


First,  it is necessary. Second, it is form of politeness.



Another behavior has its own name . . .



Do you know how is it called ?



                How is it called ?



                                How is it called ?