(b) Calculate the elements Q_(LL),Q_(LK),Q_(KL) (with Q_(LL)=del^(2)Q//delL^(2) etc.) in the bordered Hessian H_(B) at the stationary point (using Q_(**),K_(**),L_(**) in the resulting expressions) H_(B)=([0,-p_(K),-p_(L)],[-p_(K),Q_(KK),Q_(KL)],[-p_(L),Q_(LK),Q_(LL)]), in which the Q_(KK) defined below can be assumed as given: {:[Q_(KK)=(Q_(**))/(K_(**)^(2)(L_(**)+caK_(**))^(2))(a(a-1)(L_(**)+caK_(**))^(2)+2a^(2)bcK_(**)(L_(**)+caK_(**)):}],[{:+b(b-1)(ac)^(2)K_(**)^(2)).]:}