Consider the following UML and the corresponding suggested implementation.

Find all the coupling between classes; make sure to identify the type of the coupling.

Redesign the model in order to decrease the coupling as much as possible.

$\backslash$table$[[$Student$],[-$name: string$],[-$id: int$],[+$student $($string name, int id$)$:$],[$void$]]$

$\backslash$table$[[$Teacher$],[-$name: string$],[-$id: int$],[+$teacher $($string name, int id$)$:$],[$void$]]$

$\backslash$table$[[$Course$],[+$add $($string name, int id$,]]$ Boolean $x)$: void