Enemies of the same type each shoot on random intervals

I have an enemy sprite that I spawn them in random places. I would like the enemies to be able to shoot bullets randomly between 2 to 4 seconds. When I use the "System/On Every X Seconds" event with Random(2,4) command, all enemies shoot at the same time. I would like each instance of the enemy shoots randomly. Just wondering how can I achieve this?

Give thematimer behaviour - now they are independent.

System conditions don't distinguish between instances even if you used it with For Each.

Like Somebody said, use random expression as duration of timer and use for each