Classify the following experimentally observed processes into strong, electromagnetic and weak reactions by considering the particles involved and the appropriate selection rules.

(a) π⁻ → π⁰ + e⁻ + ν̅_e 

(b) γ + p → π⁺ + n;

(c) p⁺ p̅ → π⁺ + π⁻ + π⁰; 

(d) D⁻ → K⁺ + π⁻ + π⁻;

(e) Λ + p → K− + p + p; 

(f) π⁻ + p → n + e⁺ + e⁻.