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2 parts please show steps

please answer these 2 I've got the answer of 6th

6. A commitment on the project requires an initial outlay of $10 000.00 and a further outlay of $5000.00 after eleven years. Net returns are $5 000.00 per year for five years. What is the net present value of the project at 16%? 7. A loan of $19 000.00 is repaid by quarterly payments of $900.00 each at 8% compounded quarterly. What is the principal repaid by the 21st payment? 7. A loan of $19 000,00 is repaid by quarterly payments of $900.00 each at 8% compounded quarterly. What is the principal repaid by the 21st payment? A debt of $41 000.00 is repaid in monthly installments of $660.00. If interest is 8.4% compounded quarterly, what is the size of the final payment? 6. A commitment on the project requires an initial outlay of $10 000.00 and a further outlay of $5000.00 after eleven years. Net returns are $5 000.00 per year for five years. What is the net present value of the project at 16%? 7. A loan of $19 000.00 is repaid by quarterly payments of $900.00 each at 8% compounded quarterly. What is the principal repaid by the 21st payment? 7. A loan of $19 000,00 is repaid by quarterly payments of $900.00 each at 8% compounded quarterly. What is the principal repaid by the 21st payment? A debt of $41 000.00 is repaid in monthly installments of $660.00. If interest is 8.4% compounded quarterly, what is the size of the final payment