Enter at 2400nm, up to the wind REF LINE and just make a pencil mark.

Now from 16000kg Fuel, work backwards.

This can be tricky - but for this example, the landing weight is 45000kg, which is the LW REF LINE, so there is no LW adjustment to make.

Just draw a line from 16000kg across to the 29000ft pressure altitude curve.

From here, draw a line down to the WIND REF LINE. Where this line meets the WIND adjustment curve you marked earlier you get the 'max' head wind .... We come up with a fraction under 40kts.

The answer spread is 35 / 15 / 70 / 0 ...... so the answer must be 35 kts.

Do NOT get worried if your answer is slightly different from those on offer - this is quite common.

But In this case I would be more than happy with the 35kt option ....