For each of the following reactions establish whether it is allowed or not; if it is not, give the reasons:

(1) μ⁺→e⁺ + γ;

(2) e → ν_e + γ;

(3) p + p→ Σ⁺ K⁺;

(4) p+p → p⁺Σ⁺ + K^-;

(5) p → e⁺+ ν_e;

(6) p+p → Λ + Σ⁺;

(7) p + n →Λ + Σ⁺;

(8) p + n → Ξº+ p;

(9) p → n + e⁺+ ν_e;

(10) n → p + e⁺ ν_e.