(1) Whether his department has conducted an audit of the unused land that has been earmarked for housing development in Gauteng; if not, why not; if so, (a) how much land is available and (b) how long has the land been unused; (2) whether he will provide details of the land which has not been developed or serviced for such use for longer than five years; if not, why not; if so, what are the reasons for not utilising the land; (3) whether his department has any plans to avoid further unrest and illegal developments that are similar to that of Lenasia which led to the demolition of houses in 2012; if not, why not; if so, (a) what plans and (b) what are the further relevant details?