A: An area of ‘extensive commercial grain farming’ – The Prairies, USA.
B: A terminal station of ‘Trans-Siberian Railway’ – Vladivostok, Russia.
C: An area of ‘nomadic herding’ – Sahara Desert, Africa.
D: An area of ‘commercial livestock rearing’ – Pampas, Argentina.
E: A major sea port of Asia – Shanghai, China.
F: A major international airport of Europe – Heathrow, London.
G: A major shipping canal – Suez Canal, Egypt.

If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?