how long to cook a fully cooked frozen turkey?
['8- to 12-pound turkey: 4 to 4 1/2 hours.', '12- to 14-pound turkey: 4 1/2 to 5 3/4 hours.', '14- to 18-pound turkey: 5 3/4 to 6 1/4 hours.', '18- to 20-pound turkey: 6 1/4 to 6 3/4 hours.', '20- to 24-pound turkey: 6 3/4 to 7 1/2 hours.']