With reference to his reply to question 1758 on 12 July 2017, (a) what is the total monthly expenditure for the internal security officer protecting the Head of the Department of Home Affairs, including (i) salary, (ii) benefits, (iii) over-time payment, (iv) incidentals and (v) other costs, (b) on what date was the threat and risk analysis conducted and (c) how often is the situation reviewed?