Dear all I am posting here as I am not sure where I should classify my problem.

I have wrote one page description and I have uploaded it here (I am really bad with writing equations online)

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my problem should not be too hard to solve and I need your help to help me do the first step in solution. Which is the right method? What is the label of the mathematical field that I should focus to solve it.

If you need any clarification for the problem given please let me know.

I would like to thank you in advance for your help

B.R

Alex