b$-2.$ Identify the critical activities, and determine the duration of the project.

The critical activities are $1,2,4,6,8,$ and $9.$

c$-1.$ The following information pertains to a project that is about to commence. Which activities would you be concerned with in terms of timely project completion?

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$Precedes $(s)$