Hi @Hafila Hatta ,

Your have created 4 independent strings for task creation. Instead you should every string with every possible solution and a wait for condition to wait on completion. When all is completed, the requested item should be updated accordingly. e.g. if user select 1 & 2, then this. If user select 1, 2 & 3 then this. 

This is "just" another solution according to what @Josh Pirozzi already have mentioned. 

If my answer has helped with your question, please mark my answer as accepted solution and give a thumb up.

Best regards

Anders