Question: A professor needs help from 3 student helpers to complete 4 tasks. The first task is grading, the second is scanning; the third is copying,

A professor needs help from 3 student helpers to

A professor needs help from 3 student helpers to complete 4 tasks. The first task is grading, the second is scanning; the third is copying, and the fourth is organizing student portfolios. The estimated time for each student to do each task is given in the matrix below. 3 Student A B C 40 1 90 120 110 2 50 60 4 20 50 30 60 50 70 Which of the following constraints represents the assignment for student A? XA1 +XA2 + XA3 + XA4 = 0 XA1 +XA2 + XA3 + XA4 = 1 XA1 +XA2 + XA3 + XA4 2 1 XA1 +XA2 + XA3 + XA4 20

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