11. State whether the following will cause a shift of demand or movement along the same demand curve. Justify your answer giving one reason for each:
(i) The effect of rise in the price of petrol:
(1) On demand for cars.
(2) On demand for public transport.
(ii) The effect of a sharp increase in air fare due to rise in aviation fuel:
(1) On tourism.
(2) On business travel.