Q. 3: NO CHANGE!
Surface area has no effect on either the kinetic or static forces of friction. This is because the “microscopic” area of the object is the same in both cases. In normal circumstances, with the largest surface area of the object in contact with the table there are a large number of "contact" points that support the load. With the smallest area in contact (e.g.: a brick standing on end) there are fewer contacts but as long as the area of each contact is larger due to the higher pressure (same force, smaller unit area) then there will be no difference in the amount of friction