<Li> Transportation (automobiles, aircraft, trucks, railway cars, marine vessels, bicycles, spacecraft, etc .) as sheet, tube, and castings . </Li> <Li> Packaging (cans, foil, frame of etc .). </Li> <Li> Food and beverage containers, because of its resistance to corrosion . </Li> <Li> Construction (windows, doors, siding, building wire, sheathing, roofing, etc .). </Li>

Determine the oxidation state for the element aluminium in the species al(oh)4 -