Match the following pollutants with their corresponding control methods.
Pollutants Control
A) Particulate matter I) Catalytic converter
B) Carbon monoxide II) Scrubber
C) Sulphur dioxide III) Incinerators
D) Hospital wastes IV) Electrostatic precipitator
Length of the streets, in km, are shown on the network. The minimum distance travelled by the sweeping machine for completing the job of sweeping all the streets is ________ km. (rounded off to nearest integer)