[填空题]
(a) How much energy is released when an dfs3(2bt+ f w;x3 bkgb 8pc :ag-a*kt +zsmxi.electron and a positron annihilate each otg: asi -8.pc* xaz+tkmher? $E_{\text{total}}$= MeV
(b) How much energy is released when a proton and an antiproton annihilate each other? (All particles have $KE = 0$.) $E_{\text{total}}$ = MeV
