Considering that the total surface water available in the Republic averages about 49 200 million m3 annually, of which about 4 800 million m3 annually originates from the Kingdom of Lesotho, a portion of this runoff known as the Ecological Reserve needs to remain in the river in order to maintain the natural environment along the watercourse, (a)(i) what total amount in water bill does the Republic pay to the Kingdom of Lesotho on annual basis and (ii) which areas benefit more from this water agreement, (b)(i) what is the nature of contract between the Kingdom of Lesotho and the Republic regarding water and (ii) by what date will the contract lapse and (c) what is the Republic doing to ease the burden on the Kingdom of Lesotho such that it is self-sufficient on water?,