4

3

1

2

38%

58%

62%

28%

13//144

125/432

19/144

If a = -b , the solutions of the system lie on the line y-x = 1/2

If both a+b and a-b are not equal to 0 , the system has a unique solution

If a = b , the solutions of the system lie on the line x + y =1/2

If both a+b and a-b are not equal to 0 , the system has no solution

0 is not an eigenvalue of A

1 is an eigenvalue of A

1 is not an eigenvalue of A 

0 is an eigenvalue of A 

4

3

2

5