1)-Gaussian Elimination + LU Decomposition: A) Ax=B is given and L and U are given, find x and name the steps used to find X. B) Changing which aspects would change the solution? Linear combinations of rows Linear combinations of columns switching columns and corresponding rows in x exchanging two rows C) Find two vectors of A that span the column space. B) Say if b is a solution of A, iustify the answer using column spaces. E) Irue/False: LU decomposition symmetric and positive definite is unique. Cholesky decomposition symmetric and positive definite is unique