(1) What amount has the Social Housing Regulatory Authority (SHRA) spent on legal fees in resolving staff dismissal disputes since 1 January 2011; (2) (a) which positions resulted in the spending of legal fees to resolve staff dismissal disputes since 1 January 2011, and (b) what was the (i) nature, (ii) cost and (iii) resolution of each dispute; (3) what is the current vacancy rate at SHRA?