Can anyone please help me with 11 and 12

11. A small group of SAS1 students form an investment club in order to put their vast mathematics of finance knowledge to practical use. Their first business transaction is the purchase of a plot of land in Gauteng, which they believe is ideally located so as to benefit from industrial development. As the students are very short of cash, they negotiate a bond for 100% of the purchase price, namely R200 000. The bank is also willing to defer the start of repayment of the bond until the students have completed their studies in exactly 21 years time. The first bond repayment will therefore occur immediately upon completion of their studies, and will be at the rate of R4000 per month until the bond is repaid. If the bank charges an interest rate of 15% per annum payable monthly, find: (a) the number of full monthly payments necessary to repay the bond, and (b) the amount of any final reduced monthly payment needed to complete the repayment process. The rent of a house is R 1500 p.a. payable quarterly in arrear. The tenant wishes to pay a sum now to dispense with the payment of rent in the 4th; 5th; 6th and 9th years. What should the sum be if interest is: (a) 4% p.a. effective. (b) 4% p.a. convertible quarterly. 12. 11. A small group of SAS1 students form an investment club in order to put their vast mathematics of finance knowledge to practical use. Their first business transaction is the purchase of a plot of land in Gauteng, which they believe is ideally located so as to benefit from industrial development. As the students are very short of cash, they negotiate a bond for 100% of the purchase price, namely R200 000. The bank is also willing to defer the start of repayment of the bond until the students have completed their studies in exactly 21 years time. The first bond repayment will therefore occur immediately upon completion of their studies, and will be at the rate of R4000 per month until the bond is repaid. If the bank charges an interest rate of 15% per annum payable monthly, find: (a) the number of full monthly payments necessary to repay the bond, and (b) the amount of any final reduced monthly payment needed to complete the repayment process. The rent of a house is R 1500 p.a. payable quarterly in arrear. The tenant wishes to pay a sum now to dispense with the payment of rent in the 4th; 5th; 6th and 9th years. What should the sum be if interest is: (a) 4% p.a. effective. (b) 4% p.a. convertible quarterly. 12