1. When the payment is made at the end of each year, it is called as ordinary annuity
Present value of annuity = C * [(1-(1+R)^-N)/R]
Where, C = Payment per period
R = Interest rate per period
N = Number of periods
So, Present value of annuity = 500 * [(1-(1+6%)^-5)/6%
= 500 * [(1-(1.06)^-5)]/0.06
= 500 * [( 1 - 0.74725817286)/0.06
= 500 * 4.21236378567
= 2106.18189283
So, the present value of annuity when the payment is made at the end is $2106.18189283
2. When the payment is made at the end of each year, it is called as annuity due
Present value of annuity = C * [(1-(1+R)^-N)/R] * (1+R)
So, Present value of annuity due = 500 * [(1-(1+6%)^-5)/6% * (1+6%)
=500 * [(1-(1.06)^-5)]/0.06 * (1.06)
= 500 * [( 1 - 0.74725817286)/0.06 * (1.06)
= 500 * 4.21236378567 * (1.06)
= 2232.55280641
So, the present value of annuity when the payment is made at the beginning is $2232.55280641
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