Question 1142771
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The instructions (or hints) that go with your post, are IRRELEVANT to the problem solution (as in part (a) ),


or simply scare the tutors (as in part (b) ).


How may an answer to this problem go without appropriate units ?   -- Only in the case if it is DEFECTIVE.



How may an answer to  ANY  problem go without appropriate units ?   -- Only in the case if it is  DEFECTIVE.



Without these instructions,  the problem would be much more attractive for tutors,  and you would obtain much more interesting solutions.



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Let me reveal one secret to you.


The tutors (and personally, me) do not like very much when the visitors start instruct them.


Keep in mind that you come to the forum to get help from tutors - not to instruct them.


In that special case, when you want to request the solution in some special/specific form, 

write your instructions VERY CAREFULLY.


Otherwise, it may happen (as in this post), that posting your instructions, you will demonstrate your incompetency . . .