Question: A professor needs help from three student helpers to complete four tasks. The first task is grading; the second is scanning; the third is copying,

A professor needs help from three student helpers to complete four tasks. The first task is grading; the second is scanning; the third is copying, and the fourth is organizing student portfolios. The estimated time in hours for each student to do each task is given in the matrix below.
\table[[,1,2,3,4
 A professor needs help from three student helpers to complete four

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