Write balanced net ionic equations using half-reactions

Question

Write balanced, net ionic equations using half-reactions:

1. Chlorite ion reacts with bismuth metal (acidic conditions) and produces chloride ion and BiO+
2. Permanganate ion reacts with elemental bromine (acidic conditions) producing Mn2+ and bromate ion
3. Iodate ion reacts with iodide ion under (acidic conditions), producing iodine as the only product containing a halogen
4. Iron (III) ion reacts with solid iron and produces iron (II) as the only product
5. Chromate ion reacts with zinc metal (basic condition), and produces solid chromium (III) hdroxide and Zn2+

Please explain and show the steps.