What are the solutions of this system of equations? (-2, -1) and (4, 17) or (-2, 11) and (4, -7) or (2, -1) and (-4, 17) or (2, 11) and (-4, -7)?
a) (-2, -1) and (4, 17)
b) (-2, 11) and (4, -7)
c) (2, -1) and (-4, 17)
d) (2, 11) and (-4, -7)