With reference to the SA Civil Aviation Authority, (a) how many persons have written the (i) Air Law and Procedures Exam or (ii) any other exam in each month in the (aa) 2012-13, (bb) 2013-14 and (cc) 2014-15 financial years, (b) what have the average results been, (c) what are the respective registration fees for each exam, (d) how are the exams assessed, (e) what investigations have taken place into the (i) process, (ii) procedures and (iii) mechanisms associated with these exams in the specified financial years, (f) who conducted these investigations and (g) what conclusions were reached in these investigations?