O-2 Convert currency

Create three objects for three people with the following info. Firstname, lastname, bank account (a number in us dollars) and country of residence. 

The bank account is going to be a number that the person has to his/her bank account in US dollars. 

Add a new property that corresponds to how much 1$ to the currency of every person's country corresponds.

The persons are coming from Greece, Switzerland and Australia respectively. 

Create a function that creates a new property for each person that shows the bank account in his country's money.