Rule 5 tells us that K stocks the only aisle between the two aisles that M stocks.
So, there are two issues with your above setup:
1) K does not stock Aisle 2. 2) There are two aisles in between the two aisles that M stocks.
We cannot have K stock Aisle 3 because it would simultaneously break Rules 3 and 5. If K stocked Aisle 3, M would have to stock Aisles 1 and 4. However, we know from Rule 3 that M cannot stock Aisle 1 and we know from Rule 5 that there is only one aisle between the two aisles that M stocks, not two.
Hope this helps! Please let us know if you have any other questions.
