Question: Here is a solution to a summation. I don't understand the solution. Please explain how we determined that 4n becomes (14)n' when switching the bounds.

Here is a solution to a summation. I don't understand the solution. Please explain how we determined that 4n becomes (14)n' when switching the bounds. Please also explain how we evaluated the summation tobe equal to643. If you could also give another example of how to change the inside of a summation when switching bounds, I would really appreciate it.Thanks so much.n=-|h[n]|=n=-|4nu[2-n]|=n=-24n=n'=-2(14)n'=643

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