PS2.4 Compute the matrix-vector products Ax below by definition (see the definition on page 2 of Worksheet 2.2). If a product is undefined, explain why. Show your work. HA (a) [83 5 1 (b) [$ 0 0 0 and v= (c) I3v, where I3 is the 3 x 3 identity matrix I3 = 0 1 001 -7 13

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