(a) How many principals were dismissed from their posts in (i) 2011, (ii) 2012, (iii) 2013, (iv) 2014 and (v) 2015 and (b) in respect of each specified case (i) what is the name of the school from which each specified principal was dismissed and (ii) how many principals were dismissed as a result of (aa) poor performance, (bb) disciplinary action and (cc) any other grounds?