The reduced row echelon form of is equal to R =
(a) What can you say about row 3 of A? Give an example of a possible third row for A.
(b) Determine the values of a and b.
(c) Determine the solution of the homogeneous system of equations Rx = 0 in parametric vector form.
(d) What is the dimension of the column space of A? Do the columns of A span R3 ?