(1) (a) On what date did each (i) regional and (ii) provincial Eskom office perform emergency drills in anticipation of a national power grid failure and (b) what was the reason for each of these drills (i) in the Friday, 27 March 2015 379 INTERNAL QUESTION PAPER: NATIONAL ASSEMBLY NO 9 - 2015 (aa) 2009-10, (bb) 2010-11, (cc) 2011-12, (dd) 2012-13 and (ee) 2013-14 financial years and (ii) since 1 April 2014; (2) whether she has found that a national power grid failure is an imminent possibility?