(Simple regular Transposition Cipher) You suspect the following text to have been the result of a regular transposition cipher. TIEUT FLTST ADTAA ETIEH OUOHT HSEUO EEINS XRTRC ISVAS LFOAH EBIER TMMGE HSNSR MUHTI LSUDT ASOAN TAFO

a. [3pt] Determine all possible key lengths (based on the fact that it is a regular cipher) in the range 5 - 13.

b. [6pt] Test all possible key lengths from a) using the vowel test: at least half the rows should have at least 40% vowels and the other rows shouldn't be too far off, count Y as a vowel. Show results of your counts for all key-lengths. Based on the test, order the key-lengths in the most likely order. (State that order explicitly.)

c. [11pt] Try key lengths in the order suggested by b) and decrypt the cipher text by anagramming. Include details of how you broke the cipher, including failed attempts.