Determine the future value of the following single amounts (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1) (Use appropriate factor(s) from the tables provided.):

$15,000 i= 6% n= 12

$20,000 i=8% n=10

$30,000 i=12% n=20

$50.000 i=4% n=12