i thought it was 2 weeks but I was wrong

i thought the total slack was 2 but i was wrong.

\begin{tabular}{cc} \hline Activity & Slack Time (weeks) \\ \hline A & 0 \\ B & 0 \\ C & 1 \\ E & 1 \\ F & 0 \\ \hline \end{tabular} What is the total slack for the non critical path(s) in the project? week(s) (Enter your response as a whole number.) b) The activities on the critical path are A-B-F c) The total project completion time for Rafay Ishfaq's software firm is 13 weeks correct d) Determine the slack time for each of the activities. What is the total slack for the non critical path(s) in the project? week(s)