Chapter 8.3, Problem 3CP

(a)

To determine

Whether the events are certain:

$E=\left\{1,2\right\}$

$\begin{array}{l}F=\left\{1,2,3,4\right\}\\ G=\varphi \end{array}$

(b)

To determine

Whether the events are impossible:

$E=\left\{1,2\right\}$

$\begin{array}{l}F=\left\{1,2,3,4\right\}\\ G=\varphi \end{array}$