What number of (a) vehicles are available for visible policing with specific reference to sector policing at the Kempton Park Police Station, (b) the specified vehicles have mileage of (l) 1-100 000 kms, (II) 100 001-200 000 km&, (Ill) 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?