2. What can be deduced about the relationship between sets A and B if the following is true? c) A-B-A e) A-B-B-A Give formal descriptions (without using Peano 's notation) for each of the following sets: 3. a) The set containing 0, 11, and 100 b) The set containing all integers greater than 4 c) The set containing all odd integers d) The set containing the string aba e) The set containing the empty string f) The set containing the empty set