(1)With reference to the deal between Eskom and Exxaro-owned Arnot Colliery to supply coal to the Arnot Power Station, (a) what grade of coal was (i) contracted for and (ii) actually received by Eskom, (b) at what price, and (c) why was the contract cancelled; (2)with reference to the current deal between Eskom and Optimum Colliery to supply coal to the specified power station, (a) what grade of coal (i) was contracted for and (ii) is actually being received by Eskom, (b) at what price and (c) why is it suitable for use by Arnot Power Station?