TechVision Solutions is a forward$-$thinking startup on a mission to revolutionize urban mobility. Their

latest endeavor is developing a state$-$of$-$the$-$art autonomous drone delivery system. To ensure timely

completion of this system, they need your team$$s help to employ project scheduling, PERT, and

crashing techniques.

The table below was generated after surveying the experts in the field, and includes the activities$$ times

$($days$),$ predecessors, costs $($USD$),$ as well as the crash times.

The project should be completed within $30$ days, after which the opportunity costs of losing customers

are estimated at $$4,000$ for every additional day