The PERT network shows the schedule for a construction project to add additional lab capacity to a hospital.

$($time is in weeks$)$

Question $1(5$ Points$)$:

$\backslash$table$[[$ES$,$Aativity,EF$],[$Slack$,,$Slack$],[$LS$,\backslash$table$[[$Gepacted$],[$Time lowat$]],$LF$]]$

Which activities have the highest slack, and how much is the slack?