Compute the determinant of the matrix 2 1 Co A = 01 2 -1 13 0 21 -1 using (a) row operations, (b) expansion by the second column, (c) Sage [attach a screenshot]. (d) What is the term sign(0 ) alo(1) . a20(2) ' 930(3) . do(4) for o E S4 the permutation o(1) = 3, o(2) = 1, o(3) = 4, o(4) = 2 and A = (ajj) the matrix above