Problem 4.9 in the textbook (modified): Consider AES with 128-bit block length and 128-bit key length. Suppose that after the first step (of just adding the original key) the state matrix is OxEEEE...EE and the key matrix (after one round of the key schedule) is OxFFFF...FF. What is the output of the next round of AES after applying the four basic operations? Write your answer in hex.

Textbook : C. Paar and J. Pelzl, Understanding Cryptography, Springer, 2009. ISBN 978-3-642-04100-6.