2. 5 marks Consider the m x n-matrix A and the vector DeR that are given by A = [auj], = [bi] where Qij = = (-1)i+j(i j), bi = (-1) for i = 1,.-m and j = 1,..., n. Note that ajj is the entry of A at the i-th row and the j-th column. Consider the following condition on vectors TER: (Conditionl) A