Reduce the Payoff Matrix by Dominance

Essay

Reduce the payoff matrix by dominance.
​ $$\begin{array} { l } \quad\quad\quad\quad\quad\quad\quad\text { B } \\\begin{array} { l l l } &&&&&p & q & r\end{array} \\\begin{array} { r l } &a \\A & b\end{array} \left[ \begin{array} { c c c } 3 & 0 & 12 \\14 & - 2 & - 5\end{array} \right] \\\end{array}$$