Hydrogen cyanide is formed from the combustion of polyurethane and may pose an inhalation hazard. One study of polyurethane combustion indicated that the maximum yield of hydrogen cyanide per gram of polyurethane foam ranged from 0.5 to 1.05 milligrams under flaming conditions. Using this study, what is the possible maximum milligrams of hydrogen cyanide that is formed when 5 kilograms of polyurethane foam is burned during a fire incident? __________.