If the process of elimination subtracted 4 times row 1 from row 2 and then subtracted 2 times row 2 from row 3 to change the 3 by 3 matrix A to an upper triangular matrix U. If A can be factorized into A=LDU, then O a. 1 0 0 L=4 1 0 02 Ob. 1oo L = 1 1 0 0 1 1 O c. L = 1 O d. [100 L = 1 1 0 0 3 1 O e. cannot be determined If the process of elimination subtracted 4 times row 1 from row 2 and then subtracted 2 times row 2 from row 3 to change the 3 by 3 matrix A to an upper triangular matrix U. If A can be factorized into A=LDU, then O a. 1 0 0 L=4 1 0 02 Ob. 1oo L = 1 1 0 0 1 1 O c. L = 1 O d. [100 L = 1 1 0 0 3 1 O e. cannot be determined