The Tinker Construction Company is ready to begin a lecture theater project that must be completed in $24$ months. This project has four key activities $($A$,$ B$,$ C$.$ D$)$ with the project network shown below.

The Project Manager, Segun Ayodeji, has concluded that he cannot meet the deadline by performing all these activities in the normal way. Therefore, Segun has decided to use the PM method of time$-$cost trad$-$offs to determine the most economical way of crashing the project to meet$$the$$deadline$.$