Question: 2 0 - 1. Let A = 4-5 21], B = 7-5 1-4-3 113], c = [ 12 }], 3 10 and D =

2 0 - 1. Let A = 4-5 21], B = 7-5

2 0 - 1. Let A = 4-5 21], B = 7-5 1-4-3 113], c = [ 12 }], 3 10 and D = -2 1 -1 4 Compute the following quantities, or explain why they do not exist: (a) -2A (b) B-2A (c) AC (d) CD

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