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

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

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

public add $($string name, int id$,$ Boolean $x)$

$\{$

controller c$=$new controller $()$;

if $(x)$

$\{$

Student s$-$new student $($name$,$ id$)$;

c$.$addStudent$($s$)$;

$\}$

else

$1$

Teacher $t-$new teacher $($name$,$ id$)$;

c$.$addteacher$($t$)$;