4. Other friends hear about this and decide they want to do the same for their daughter. They were also able to establish a college fund that earns 8% compounded annually. The made the first payment on her 5th birthday. They can pay R7000 each year. However, for various reasons they could only contribute R3000 on her 10th birthday. They paid R7000 again from her 11th birthday to her 15th birthday. They will withdraw the money as shown below. How much money will be available at year 21? (Thus, what is the value of X) [1 R29000 R27000 R25000 10 11 12 13 14 15 16 17 18 19 20 21 R3000 R7000 R7000