function F = KBg4F(x)
%

F(1) = -0.84 + (1-x(2)) + x(3) + x(5) - x(6)*x(5) - x(7)*x(3) - x(7)*x(5) + x(7)*x(6)*x(5);
F(2) = -0.55547 + (x(2));
F(3) = -0.80457 + (1-x(4)) + x(1) + x(2) - x(8)*x(2) - x(9)*x(1) - x(9)*x(2) + x(9)*x(8)*x(2);
F(4) = -0.88073 + (1-x(5)) + (1-x(4)) + x(2) - x(10)*x(2) - x(11)*(1-x(4)) - x(11)*x(2) + x(11)*x(10)*x(2);
F(5) = -0.85629 + (1-x(2)) + x(1) + x(5) - x(12)*x(5) - x(13)*x(1) - x(13)*x(5) + x(13)*x(12)*x(5);
F(6) = -0.4085 + (x(4));
