Need the answer for the question above. (Netwrk security)

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1.7. Finding statistical structures in a cipher text message is a common cryptanalysis method. For example, given a ciphertext message, we first calculate the frequency of each letter occurring in the messages. We then compare these letter frequencies with the letter frequencies one would expect to have in the underlying language If there is a clear one-to-one correspondence, we will then know which ciphertext letter corresponds to which plaintext letter. This method is especially effective to break earlier designed encryption algorithms. In the English language, for example, the following table lists the expected fre- quency of each letter, in the decreasing order of frequencies 12.702 9.056 8.167 7.507 6.996 6.749 6.327 6.094 5.987 4.253 4.052 2.782 2.758 2.406 2.360 2.228 2.015 1.974 1 929 1.492 0.978 0.772 0.153 0.150 0.095 0.074 If the ciphertext message not long enough, we may not be able to obtain a fre is frequency we may also quency curve similar to that of the statistical letters, for th may corre want to calculate frequencies of strings of two or more Such information would spond to common such as er, or, the, ing. with punctuation be useful. that we have the following ciphertext message and space removed, where the plain-text message is written in English