_{mg^{\prime}o}^{x0*}}{x_{mg^{\prime}o}^{0}}} \right)}{0 - \frac{0}{Q}\left( {\sum\limits_{q = 0}^{Q}\frac{t_{qg^{\prime}o}^{z*}}{z_{qg^{\prime}o}}} \right)};$$ $$\rho_{g^{\prime}o}^{group*0} = \frac{0 + \frac{0}{Q}\left( {\sum\limits_{q = 0}^{Q}\frac{t_{qg^{\prime}o}^{z*}}{z_{qg^{\prime}o}}} \right)}{\left\lbrack {0 - \frac{0}{R_{0} + J_{0}}\left( {{\sum\limits_{r = 0}^{R_{0}}\frac{