Define a new class called BankAccount.

Each BankAccount should have an owner $,$ specified when a new BankAccount is created like BankAccount$("$Charlie$")$

Each BankAccount should have a balance attribute that always starts out as $0\mathrm{.}0$

Each instance should have a deposit method that accepts a number and adds it to the balance. It should return the new balance.

Each instance should have a withdraw method that accepts a number and subtracts it from the balance. It should return the new balance.

acct $=$ BankAccount$("$Darcy$")$

acct.owner #Darcy

acct.balance #$0\mathrm{.}0$

acct.deposit$(10)$ #$10\mathrm{.}0$

acct.withdraw$(3)$ #$7\mathrm{.}0$

acct.balance $.$ #$7\mathrm{.}0$