9 A map has a scale of 5 cm to 2 km. (a) The actual distance between two masts is 14 km. Calculate the distance, in cm, on the map between the two masts. (b) On the map, the surface area of a lake is 50 cm^2. Calculate the surface area, in km^2, of the actual lake. (c) Write the scale 5 cm to 2 km in the form 1 : n.