Further to the data provided above for $3$ estimates, the management is now contemplating crashing the network to the

minimum possible time under the crash cost schedule provided below. $($a$)$ What would be the minimum duration of the

project? and $($b$)$ what is the corresponding crash cost? $($c$)$ If the management wishes to crash the project down to $29\mathrm{.}85$

weeks only, what will be the total cost incurred and corresponding crash schedule?