Decide Whether or Not the Transition Matrix Is Regular $\left[\begin{array}{rrr}0.81 & 0 & 0.19 \\1 & 0 & 0 \\0 & 0.53 & 0.47\end{array}\right]$

Decide whether or not the transition matrix is regular.
- $\left[\begin{array}{rrr}0.81 & 0 & 0.19 \\1 & 0 & 0 \\0 & 0.53 & 0.47\end{array}\right]$