please answer it in a clear way

1. Compute for the present value of the following: 1. 100,000 paid at the beginning of Year 3 with interest rate of 8.75%. 2.75,000 paid at the end of Year 5 with interest rate of 9% 3.27,500 paid quarterly every beginning of the period for 7 years with interest rate of 15%. 4. 10,000 paid semi-annually every end of the period for 3 years with interest rate of 12%. 5.45,000 paid annually every end of the period for 6 years with interest rate of 6%. 6.63,725 paid every beginning of the period for 7 years with interest rate of 11.20%