Please help with writing/balancing 2 chemical equations?!?!?(10 points!!)?

hydrogen is produced by reforming light petroleum fractions or natural gas (methane, CH4) by adding steam:

CH4(g) + H2O(g) ----------> CO(g) + 3H2(g) ( Ni catalyst, 700oC )

Enough steam is used to react with about 45% of the methane (CH4), the rest of the methane is reacted with air:

2CH4(g) + O2(g) + 4N2(g) ---------> 2CO(g) + 4H2(g) + 4N2(g) ( (air) Ni catalyst)

All the carbon monoxide (CO) in the mixture is oxidised to CO2 using steam and an iron oxide catalyst:

CO(g) + H2O(g) ------------------> H2(g) + CO2(g) (iron oxide catalyst)

The carbon dioxide (CO2) is removed using a suitable base so that only the nitrogen gas (N2) and hydrogen gas (H2) remain and are used in the production of ammonia (NH3).