Answer
See answers.
Work Step by Step
The first reaction is impossible.
Conservation of charge is violated: $-1 = (-1) \neq 0 + 1 + 0$.
The second reaction is possible, via the strong interaction. No conservation principles are violated.
The third reaction violates one conservation principle.
Conservation of strangeness is violated: $1+0 = (-1) \neq -1 + 0 + 0$.
The strong interaction preserves strangeness, but the weak interaction does not. This reaction is possible via the weak interaction.
The fourth reaction violates one conservation principle.
Conservation of strangeness is violated: $1 \neq 0 + 0 + 0$.
The strong interaction preserves strangeness, but the weak interaction does not. This reaction is possible via the weak interaction.
The fifth reaction is possible. No conservation principles are violated. Leptons are involved, so the reaction must proceed via the weak interaction.
