Problem 11. [10 pts] What is the net annual cost of the following chequing accounts (options)? (Show your calculations) (a) Interest earnings of 2% with a $500 minimum balance: average monthly balance, $600; monthly service charge of S15 for falling below the minimum balance, which occurs four times a year (no interest earned in these months) (b) Monthly fee, $10.00; processing fee, 25 cents per cheque; cheques written, an average of 10 a month