1) Consider the "elementary matrices" 7 01 Elry - [88], Es-in-=[68], and EET-1 (8) E5-123 : 050 = also let Matrix A O 24 2 331 (a) Left-multiply each elementary matrix to the matrix A. Can you relate the multiplications with elementary row operations? (b) Compute the inverse of each matrix. Are they "elementary" as well?

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