Problem 6.309

Which of the following processes are forbidden by the Iaw of conservation of strangeness: (1) \(\pi^{-}+p \rightarrow \Sigma-+K^{+}\) (2) \(\pi^{-}+p \rightarrow \Sigma++K\) (3) \(\pi^{-}+p \rightarrow K^{+}+K^{-}+n\) (4) \(n+p \rightarrow \Lambda^{0}+\Sigma^{+}\) (5) \(\pi^{-}+n \rightarrow \Xi^{-}+K^{+}+K^{-}\) (6) \(K^{-}+p \rightarrow \Omega^{-}+K^{+}+K^{0} ?\)