A simple CPM network has four activities, A$,$ B$,$ C and D as shown below. The latest start time $($LS$)$ for activity $C$ is

$\backslash$table$[[,,$Immediate$],[$Activity$,$Duration,Predecessors$],[$A$,20,-],[$B$,18,-],[$C$,5,$A$,$B$],[$D$,9,$B$]]$

$25$

$27$

$18$

$20$

$22$