If money is worth 15% compounded monthly͵ what equal payments at the end of 24th and 32nd months respectively͵ will equitably settle the following obligations: (pure accumulation)
a. $11͵100 due in 5 months
b. $12͵200 due in 12 months at 7%͵ m=4
c. $ 18͵800 due in 36 months at 8% simple interest
d. $24͵400 due in 48 months at 6%͵ m=12