Problem $2$

A job shop has four work centers: A$,$ B$,$ C$,$ and D that are currently located in a facility as in locations $1,2,3,$ and $4$ as shown:

$A$ in $1B$ in $2C$ in $3$

$\backslash$table$[[,$D in $4]]$

The distance in meters between each pair of locations are as follows:

$\backslash$table$[[,1,2,3,4$