The local botanical society wants to ensure that the gardens in the town are properly taken care of. The group recently spent $100K to plant the gardens. The members want to set up a perpetual fund to provide $100K for future replantings every 10 years.

a) If interest is 5% how much money is needed for the fund? (this one I know how to do it answer= 159K)

b) If the last replanting is in year 100, how much is needed for the fund?