Based on healthcare:

The Time Value of Money: Note Future years calculated as the Power of:

Calculate the present value of the following single payments:

$-$ $$5,000$ received $10$ years in the future given a discount rate of $5\%$

$-$ $$5,000$ received $10$ years in the future given a discount rate of $10\%.$ How much less is the payment worth compared to $($a$)?$

$-$ $$5,000$ received $20$ years in the future given a discount rate of $10\%.$ How much less is the payment worth compared to $($b$)?$