(a) The management executive committee of Anglo American decided to build a sports arena that cost R8 642 400. They chose a sinking fund in order t raise this amount over the next 4 years. The fund will earn interest 12.3% interest, compounded monthly. If all 112 members of the executive agreo to contribute an equal portion into this fund, what will their monthly contributions be (to the nearest Rand)? (8 marks) (b) How much would Lindani need to deposit at the end of each month so that she would have R14 640 in 4 years time? Assume interest is paid at 15.5% compounded monthly. (7 marks)