[问答题]
Which of the following decays are possibcbgr u 1lwls +fi/)97xyz qa.g67ld r1le? For those that ar8pu9n wkmnl5 lm),cp i83m7rbe forbidden, explain which laws are viom8nw8in,lp5mr l7k)cb3 p9 m ulated.
(a) $\Xi^0 \to \Sigma^+ + \pi^-$
(b) $\Omega^- \to \Sigma^+ + \pi^- + \nu$
(c) $\Sigma^0 \to \Delta^0 + \gamma + \gamma$
