\textbf{Part B - Reaching an operator}

If the waiting time before reaching an operator exceeds 5 minutes, the call automatically ends. Otherwise, the caller reaches an operator.\\
We randomly choose a customer who calls the assistance line.\\
We assume that the probability that the call comes from an Internet customer is 0.7.\\
Furthermore, according to Part A, we take the following data:
\begin{itemize}
  \item If the call comes from an Internet customer then the probability of reaching an operator is equal to 0.95.
  \item If the call comes from a mobile customer then the probability of reaching an operator is equal to 0.87.
\end{itemize}

\begin{enumerate}
  \item Determine the probability that the customer reaches an operator.
  \item A customer complains that their call ended after 5 minutes of waiting without reaching an operator. Is it more likely that this is an Internet customer or a mobile customer?
\end{enumerate}