Hi Edwin,
I assume you're referring to question 1 of assessment 1 - dragging and dropping answer labels onto the spreadsheet?
Let us know if you are still having difficulties, but two things to note... Firstly avoid doing the assessment on a mobile phone, it should really be a laptop. Secondly, when placing the answer label, the circular target symbol should be directly over the error, not the text label!
I hope that helps, but let us know if not.
Best regards,
Graeme