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5uckerberg

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So the task requires us to reduce the completion time by 4 weeks at the minimum cost. Already we are going somewhere, here is the thing if you focus on the minimum cost in this case focus on the cheap ones, and then the second cheapest ones, and etc.

This question should remind you of primary school work such as what is the smallest number that can be made with a 4 digit number with numbers repeating twice at maximum or some other variation of the question.
 

jimmysmith560

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In addition to the above, consider the following two approaches/solutions to the question, the first one being from the exam paper you are completing, as follows:

1636178481124.png

Here is an additional solution. This one seems to be consistent with what was mentioned above more specifically:

1636178556723.png

I hope this helps! :D
 

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