What (a) is the total number of overseas trips that (i) each entity reporting to him and (ii) his department have taken in the past three years, (b) were the reasons for each trip, (c)(i) is the total number of persons that went on each trip and (ii) in what capacity and (d) was the cost of (i) road transport and (ii)(aa) first class and (bb) economy flights and (iii) accommodation?