Reg UC question been out of uk

Hi
Does any one know why there’s only three options regarding the question have you been out of uk in last two years
Under two weeks two to four weeks over four weeks
So say for example if you have been out of uk for two and half weeks etc not four weeks and not over four weeks how are you meant to tick the box if there’s no box for two and half weeks
As it’s not two to four weeks or under two weeks

Thanks
What are the questions regarding time spent out of uk when first claiming UC related too