With reference to his replies to questions 601, 602, 603, 604, 605, 606, 607, 608, 609, 610 and 611 on 7 May 2018, what is the (a) total number of posts of each specified profession (details furnished) that are vacant in each district municipality in KwaZulu-Natal and (b)(i)(aa) name and (bb) location of each institution and (ii)(aa) duration of each vacancy and (bb) date by which each vacancy is envisaged to be filled?