Write a balenced ionic equation for the reaction occurring w

Write a balenced ionic equation for the reaction occurring when:
(a) the addition of metallic aluminum to a copper(II) nitrate solution results in the precipitation of copper metal and the formation of aluminum ions in solution.
(b) metallic copper is added to a dilute solution of nitric acid,gaseous nitrogen(II) oxide is evolved and the solution becames a pale blue
(c) potassium permanganate solution is decolourised by acidified iron(II) sulfate solution.
(d) sulfur dioxide is bubbled through an acidified solution of dichromate ions,the latter is refuced to chromium(III) ions and the sulfur dioxide is oxidised to sulfate ions.
(e) sulfur dioxide in acid solution reduces iodate,iodate,IO3- to iodide ions and is itself oxidised to sulfate ions.
(f) when hydrogen sulfide is passed into a solution of iron(III) nitrate and a pale yellow precipitate is formed.