How do I Identify the start node, finish node, critical path, critical path length, average degree of concurrency, and Maximum degree of concurrency for this diagram?

\begin{tabular}{|c|c|} \hline ID & \multicolumn{1}{|c|}{ Major } \\ \hline 1 & Cyber Security \\ 2 & Cyber Security \\ 7 & Cyber Security \\ 8 & Cyber Security \\ 9 & Cyber Security \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & \multicolumn{1}{|c|}{ Major } \\ \hline & \\ 4 & Software Engineering \\ 12 & Software Engineering \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & Hostel \\ \hline 5 & mu \\ 10 & Ilmu \\ 12 & mu \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & Covid19Vaccine \\ \hline 2 & Second \\ 6 & Second \\ 7 & Second \\ 8 & Second \\ 12 & Second \\ \hline \end{tabular} \begin{tabular}{|c|c|c|c|c|} \hline Major=CyberSecurityORMajor=SoftwareEngineering & \multicolumn{2}{|c|}{Hostel=IlmuANDCovid19Vaccine=Second} \\ \cline { 2 - 4 } ID & Studentid & Major & Hostel & Covid 19 Vaccine \\ \hline 12 & SW0099869 & Software Engineering & Imu & Second \\ \hline \end{tabular} Major = Cyber Security OR Major = Software Engineering AND (Hostel = llmu AND Covid 19 Vaccine = Second ) \begin{tabular}{|c|c|} \hline ID & \multicolumn{1}{|c|}{ Major } \\ \hline 1 & Cyber Security \\ 2 & Cyber Security \\ 7 & Cyber Security \\ 8 & Cyber Security \\ 9 & Cyber Security \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & \multicolumn{1}{|c|}{ Major } \\ \hline & \\ 4 & Software Engineering \\ 12 & Software Engineering \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & Hostel \\ \hline 5 & mu \\ 10 & Ilmu \\ 12 & mu \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline ID & Covid19Vaccine \\ \hline 2 & Second \\ 6 & Second \\ 7 & Second \\ 8 & Second \\ 12 & Second \\ \hline \end{tabular} \begin{tabular}{|c|c|c|c|c|} \hline Major=CyberSecurityORMajor=SoftwareEngineering & \multicolumn{2}{|c|}{Hostel=IlmuANDCovid19Vaccine=Second} \\ \cline { 2 - 4 } ID & Studentid & Major & Hostel & Covid 19 Vaccine \\ \hline 12 & SW0099869 & Software Engineering & Imu & Second \\ \hline \end{tabular} Major = Cyber Security OR Major = Software Engineering AND (Hostel = llmu AND Covid 19 Vaccine = Second )