Is the derivative function, such as hedging dealing with foreign exchange contracts, currency swaps and forwards, of the state-owned entities reporting to her, including Eskom, Transnet and Denel, managed internally; if so, (a) how many employees work in this department in each case and (b) what is the experience level of these employees for each entity; if not, (i) who manages the derivatives function for each entity and (ii) what is the contract value for this function in each case?