function F = KBg40F(x)
%

F(1) = -0.64823 + (1-x(1)) + x(4) - x(6)*x(4);
F(2) = -0.809 + (1-x(2)) + x(1) + x(3) - x(7)*x(3) - x(8)*x(1) - x(8)*x(3) + x(8)*x(7)*x(3);
F(3) = -0.77009 + (1-x(5)) + x(4) - x(9)*x(4);
