$\backslash$table$[[$Credit Card Account$],[-$rate: double$],[-$rewards: double$],[+$CreditCard $()],[+$makePurchase$($amount$,$ category$)],[+$makePayment$($amount$)],[+$redeemRewards$()$ : double$],[+$ getRewards$()$ : double$],[+$toString $()],[+$process$()]]$

Bank Accounts

All bank accounts contain a unique account number and a current balance. Users can always check their balance.

Money Market accounts contain an annual interest rate $(3\mathrm{.}65\%).$ Users can make deposits and withdrawals.

Rewards Credit cards contain an interest rate $(24\mathrm{.}99\%)$ on purchases and a $1\%$ cashback on regular purchases, $2\%$ cashback on Groceries and $3\%$ cashback on Gas. Users can make purchases and payments and also cash rewards.

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