Determine whether 6B is defined. If it is defined, express the result as a single matrix; if it is not, say "not defined." 0 6-5 5 1 A = B = 16 1 -32-3 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The expression 6B is defined. 6B = O B. The expression 6B is not defined.

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