(1) (a) Which of the five square kilometre array (SKA) Chairs launched in December 2009 are operational, (b) what are the (i) names of the incumbents, (ii) the universities at which the chairs are lodged and (iii) the date at which they became operational; (2) (a) which chairs are not operational and (b) why not; (3) (a) how many university students are engaged in post-graduate studies under each operational chair and (b) at what level?