(a) What was the fixed establishment for the Directorate for Priority Crime Investigation in the (i) 2009-10, (ii) 2010-11, (iii) 2011-12, (iv) 2012-13, (v) 2013-14, (vi) 2014-15 and (vii) 2015-16 financial years and (b) which of the specified positions were vacant in each of the specified financial years?