Exercise 2.1.29

$u_2=\left[\begin{array}{c}\hfill .7\hfill \\ \hfill .3\hfill \end{array}\right]$and $u_3=\left[\begin{array}{c}\hfill .65\hfill \\ \hfill .35\hfill \end{array}\right]\begin{array}{ccc}\hfill & \text{ The components add to }1\text{. They are always positive. }\hfill & \hfill \\ \hfill & \text{ Their components still add to }1.\hfill \end{array}$