Please use the given normal form matrix below to answer the following questions.

Player $2$

$\backslash$table$[[$Strategy$,$A$,$B$,$C$],[$a$,12,11,11,12,14,13],[$b$,11,10,10,11,12,12],[$C$,10,15,10,13,13,14]]$

a$.$ If they exist, please find the dominant strategy for player $1$ and player $2.$

b$.$ Please find any Nash equilibria that exists.