3. Let us define sets A,B and C as follows : A={1,2,3}B={4,5}C={stars,moon,sun} Describe the following using Roster Method ( is an empty set) : (i) ABC (ii) (AB)C (iii) (AB)C (iv) BC 4. Given A={a,b,{c,d},e},B={a,b,{c,d},e},C={,} list the following : (a) AB (b) AB (c) A\B (d) B\A (e) (BC)(AC)