6. (5 Marks) A debt of $2000 plus interest at 10% compounded semi-annually is due at the end of 6 years. If $300 is paid at the end of one year, what two equal payments, one at the end of year 2 and one at the end of year 4 will satisfy the original debt. The interest rate is now 6% compounded quarterly. Use 4 years as the focal date