When carrying out a distribution process, a logistics manager provides you with the table below

explaining the precedence relationships between eight different operations as well as their

completion times

$1.$ What is the minimum duration of this mission

$2.$ Determine the operations that must be monitored with maximum attention

$($It is to highlight that each delay in these activities will negatively impact the final duration$)$

Xi

$($activity$)$

P$($Xi$)$ Duration

A F $8$

B D$,$ C $14$

C G $3$

D E$,$ G $4$

E H $5$

F H $17$

G H $12$

H $-3$