Encrypt the plaintext "Facebook" using DES without any padding or mode of operation (i.e. ECB) using the key "universe" and output the ciphertext in binary (use the byteToBin method in util). Next, generate a random number between 0 and 63; flip that bit in the plaintext; encrypt; and compute the number of bits in the ciphertext that have flipped as a result. Re-do this avalanche effect computation several times and determine the average number of flipped bits in the ciphertext.