Progressive Task?

[cylynex2]

Have a new task I made, I'd like it to not unlock the 2nd task until the first one is completed.

How would I go about this? If there's a task in the peqdb already that does this, or if it's in a pl file, if someone could just name them I can go off that. I'm not familiar with the actual tasks as I dislike doing quests myself

I did create task sets, but when I trigger the task event with the NPC, she just offers me a choice of any task in the set.

Edit: I created a task array in the npc's .pl file, all I need to know is how i can check if the PC has completed the prior quest. I see that info in the completed_tasks table, I'm just not sure how to get at it from the perl file.

thanks