A 8.8 kg box is placed on top of a 15.65 kg box (the 15.65 kg box is sitting on a table). Determine the normal force that the table exerts on the 15.65 kg box.
The table must support the weight of both boxes. I assume you know how to compute the weight.
I notice you are dumping a lot of homework questions here and showing no work at all. I will not be answering any of the others.
Someone will be gladly critique your work or thinking, if any is shown.