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14. Devise an efficient algorithm for inverting an n x n lower triangular matrix A. Suggestion: Utilize the fact that A-l is also lower triangular. Code your algorithm and test it on the matrix whose elements are day = (i+j)2 when i 2 j. Use n = 10. Form the product AA-1 as a test of the computed inverse. 14. Devise an efficient algorithm for inverting an n x n lower triangular matrix A. Suggestion: Utilize the fact that A-l is also lower triangular. Code your algorithm and test it on the matrix whose elements are day = (i+j)2 when i 2 j. Use n = 10. Form the product AA-1 as a test of the computed inverse