Consider the decays: (1) B 0 D - + + ; (2) B 0 D -

Consider the decays: (1) B⁰→D ^-+ π⁺; (2) B⁰→D^- + K⁺; (3) B⁰→π^- + K⁺; (4) B⁰ → π^- + π⁺. Find the valence quark composition of each of them, establish the dependence of the partial decay rates on the mixing matrix element and sort them in decreasing order of these rates.