{\eta_{0} = \beta_{00}\eta_{0} + \gamma_{00}\xi_{0} + \gamma_{00}\xi_{0} + \gamma_{00}\xi_{0} + \gamma_{00}\xi_{0} + \zeta_{0}}{\eta_{0} = \beta_{00}\eta_{0} + \gamma_{00}\xi_{0} + \zeta_{0}}{\eta_{0} = \