Mm’S Buffet Chafer, Food Warmer Rack, Chrome Wire Rack, Chafing Rack. Full Size Set of 4

How many comes in the pack? The display is showing only 2 but the description says 4

Can I return this if I don’t like it?

What are the dimensions of the bottom of each rack? Like, what is the minimum depth buffet table has to be for these to stand on it?

Will this product hold a 6 inch spillage pan?