In our slides, we illustrate how to break Mono-alphabetic substitution cipher by frequency analy- sis. As a result, we need a lot of ciphertext to build the frequency histogram. In this question, let's try an alternative and powerful attack-Known Plaintext Attack. Below, we are given a sentence of ciphertext and its corresponding plaintext. Please recover the secret key as good as you can and use your corrupted secret key to attack another sentence of ciphertext. Known Ciphertext: NBZQARAV KTAH ETQ CJII STL WLHQ MZCAH STL HQVZEOAV. Corresponding Plaintext: Whatever does not kill you just makes you stranger. The ciphertext you want to corrupt: IAQ LH MZCA VLQOAVH OVAZQ ZOZJE