Determine the optimal solution of a standard maximum problem from this tableau:

[0 1 1-2 1-1 0 40]
[0-2 0 4-1 3 0 32]
[1 1 0-1 1 1 0 63]
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[0 5 0 6 2 3 1 1148]

I have no idea! Here are the answers that I have in my work book:

A. Maximum z = 1148 at (6,2.3)

B. Maximum z = 1148 at (63, 16, 40)