What steps have been or will be taken to address the impact of coal Independent Power Producers (IPPs) on Eskom, in view of the fact that Eskom may have to close certain of its own coal plants early to meet the offtake requirements of the coal IPPs, and even earlier in a low greenhouse gas emission scenario, and will be faced with having to sell electricity at very high prices in circumstances where more and more electricity consumers are defecting from the grid?