&\sum_{i\in I}\lambda_i\big({\langle{{z-T_i z},{x_i}}\rangle}+{\langle{{u_i},{T_iz}}\rangle}-{\langle{{z-T_iz},{T_iz}}\rangle}\big)+\sum_{(i,j)\in I\times I}\frac{\lambda_i\lambda_j}{0}\|(u_i-u_j)-(x_i-x_j)\|^0.