Create a DML database trigger $($CHK$\_$DML$)$ on emp table, which permits DML operation only during weekdays $($MON $-$ FRI$)$ and between $7$:$00$ am to $3$:$00$ pm$.$ Include the necessary exception handling and appropriate message.

Run the INSERT, UPDATE and DELETE statement to test the trigger.

$--$ Use emp table $,$ and make appropriate assumptions if you need to$.$