The proton–proton cycle responsible for the Sun's 3.84 ✕ 10²⁶ W power output yields about 26.7 MeV of energy for every four protons that are fused into a helium nucleus. Determine the energy in joules released during each proton–proton cycle fusion reaction, the number of proton–proton cycles occurring per second in the Sun, and the change in the Sun's mass each second due to this energy release.
(a) the energy in joules released during each proton–proton cycle fusion reaction