(1) (a) What investigations have been conducted as a result of the introduction of a fraud hotline at the Civil Aviation Authority and (b) how many investigations have been conducted as a result of the fraud hotline; (2) (a) how many incidents of fraud have been reported through the hotline (i) in (aa) 2011 and (bb) 2012 and (ii) since 1 January 2013 and (b) in respect of each of the specified years, how many (i) of these reports and (ii) investigations resulted in criminal convictions?