ULEFIZBCXFICBWRDVRUMSUABPJGIIZBVREINE (a) You believe that the key length used to encrypt the message was either 1, 2, 3, or 4. Using displacement coincidences, find the number of coincidences corresponding to each of the possible key lengths. Based on this, what do you suspect is the key length? ULEFIZBCXFICBWRDVRUMSUABPJGIIZBVREINE (a) You believe that the key length used to encrypt the message was either 1, 2, 3, or 4. Using displacement coincidences, find the number of coincidences corresponding to each of the possible key lengths. Based on this, what do you suspect is the key length