function F = KBg50F(x)
%

F(1) = -0.5883 + (x(2));
F(2) = -0.79667 + (1-x(4)) + x(2) + x(3) - x(6)*x(3) - x(7)*x(2) - x(7)*x(3) + x(7)*x(6)*x(3);
F(3) = -0.71501 + (1-x(5)) + x(1) - x(8)*x(1);
F(4) = -0.85037 + (1-x(4)) + x(1) + x(5) - x(9)*x(5) - x(10)*x(1) - x(10)*x(5) + x(10)*x(9)*x(5);
F(5) = -0.72154 + (1-x(1)) + x(4) - x(11)*x(4);
