What number of (a) vehicles ate available for visible pollclng with speciflc reference to sector policing at the Sebenza Pollca Station, (b) the specified vehicles have mileage of (i) 1-100 000 kma, (II) 100 001-200 000 kms, (III) 200 001-300 000 kms and (iv) over 300 000 kms and (c) days In 2017 was each of the vehicles out of working order?