A four-digit PIN code is required for a bank's ATM card. An encrypted code is stored with the bank account instead of storing the card's PIN code. For example, the PIN code 1234 forms the code matrix C = The code matrix C is then multiplied by a key matrix K to obtain the encrypted matrix E. In other words, To determine the original PIN code from an encrypted code, the bank uses Suppose the key matrix is given by Determine the PIN code if the encrypted code is 2, 7, 3, 5