Jane Doe plans to make twelve end-of-month payments of $18,000 each on a short term investment account. The account earns a monthly interest rate of 2.5%. a. What is the present worth (i.e., Po) of these payments? b. Repeat Part (a) but assuming that they are beginning-of-month payments. a. The present equivalent of the payments is $ nearest dollar.) (Round to the b. The present equivalent of the payments is $. (Round to the nearest dollar.)