Question: Use branch-and-bound to solve the assignment problem with the following cost matrix. For the first upper bound, consider diagonal elements of the matrix. Explore a

Use branch-and-bound to solve the assignment problem with the following cost matrix. For the first upper bound, consider diagonal elements of the matrix. Explore a tree whose nodes correspond to partial assignments. Show the best path with its cost in the completely-explored tree

	1	2	3	4
a	94	1	54	68
b	74	10	88	82
c	62	88	8	76
d	11	74	81	21

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