function err = KB88Fs(x)
%

F(1) = -0.087686+(1-x(3));
F(2) = -0.99639+(1-x(1))+x(2)+x(5)-(1-x(1))*x(2)-(1-x(1))*x(5)-x(2)*x(5)+(1-x(1))*x(2)*x(5);
F(3) = -0.17007+(1-x(5))+(1-x(1))-(1-x(5))*(1-x(1));
err = norm(F);
