[填空题]
(a) How much energy i.dlk5bqiyi 3j gl 3mv 1)vfmr2ge;+1qwrv8 cg p )52ega3t(qgs released when an electron and a positron annihilate each other38atc pqvge)g(gw 2 5r? $E_{\text{total}}$= 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
