if possible explain how to do it in financial calculator, other than that pls giver answers

Problem 6-4 Calculating Annuity Present Value [LO1] An investment offers $6,400 per year for 15 years, with the first payment occurring one year from now. If the required return is 6 percent, what is the value of the investment? (Do not round intermediate calculations and round your final answer to 2 decimal places, e.g., 32.16.) Present value $ What would the value be if the payments occurred for 40 years? (Do not round intermediate calculations and round your final answer to 2 decimal places, e.g., 32.16.) Present value $ What would the value be if the payments occurred for 75 years? (Do not round intermediate calculations and round your final answer to 2 decimal places, e.g. 32.16.) Present value $ What would the value be if the payments occurred forever? (Do not round intermediate calculations and round your final answer to 2 decimal places, e.g., 32.16.) Present value