(a) How many mine closure certificates were issued in the (i) 2011-12, (ii) 2012-13, (iii) 2013-14, (iv) 2014-15 and (v) 2015-16 financial years and (b) what was the (i) name and (ii) location of each mine that was issued with a closure certificate and (c) on what date was each specified certificate issued?