1ex125: nrhs 2 2 PETSC LU: 3 0-the LU numfactorization 4 0-the MatMatSolve 5 1-the MatMatSolve 6 0-the MatMatSolveTranspose 7 1-the MatMatSolveTranspose 8 0-the MatSolve 9 1-the MatSolve 10 0-the MatSolveTranspose 11 1-the MatSolveTranspose 12 1-the LU numfactorization 13 0-the MatMatSolve 14 1-the MatMatSolve 15 0-the MatMatSolveTranspose 16 1-the MatMatSolveTranspose 17 0-the MatSolve 18 1-the MatSolve 19 0-the MatSolveTranspose 20 1-the MatSolveTranspose 21