*1.2.18 Smith receives a paycheck of 3500 on the last day of each month, and immediately deposits all but 1000 of it in a bank account. The first deposit is on December 31, 2017. Smith deposits an addition- al 1000 on the 15 of every month. The account pays an annual in- terest rate of 10%. Find the balance in the account on March 31. 2018, after the deposit is made and interest is credited, in each of the following cases. (a) Simple interest based on minimum monthly balance and cred- ited on the last day of March (no interest deposited into the account in January or February) vunuas y) (c) Same as (a) but with interest credited on the last day of every month