\begin{itemize}
    \item The Boolean variable $g$ represents ``The system gives a grant.''\newline 
    $\varphi_1 \coloneqq AGF g$
     \item The Boolean variable $r$ represents ``The system sends a request.'' \newline 
    $\varphi_2 \coloneqq EGF \neg r$   
\end{itemize}