reduced row-echelon form:

** A. ** None** B. ** Exactly 1** C. ** Exactly 2** D. ** Exactly 3** E. ** Infinitely many** F. ** None of the above

If there is one solution, give its coordinates in the answer spaces below.

If there
are infinitely many solutions, enter *z* in the answer blank for

If there are no solutions, leave the answer blanks for