Chapter 10.2, Problem 31E

Solve the matrix games in Problems $19-32$, indicating optimal strategies P* and Q* for R and C, respectively, and the value v of the game. (Both strictly and nonstrictly determined games are included, so check for this first.)

$\left[\begin{array}{ccc}2& 1& 2\\ 3& 0& -5\\ 1& -2& 7\end{array}\right]$