(a) What is the total amount that was (i) budgeted for and (ii) spent on his private office (aa) in each of the past three financial years and (bb) since 1 April 2017 and (b) what was the (i) remuneration, (ii) salary level, (iii) job title, (iv) qualification and (v) job description of each employee appointed in his private office in each of the specified periods?