(a) What is the total number of persons who were arrested for (i) possession of and (ii) dealing with drugs at the (aa) Langlaagte, (bb) Brixton, (cc) Sophiatown, (dd) Parkview and (ee) Linden Police Stations in Johannesburg, Gauteng, (aaa) in the past three financial years and (bbb) since 1 January 2016 and (b) what is the total number of the specified arrests which resulted in successful prosecution in each case?