1.10 Find the symmetric closure, the transitive closure, and the reflexive and transitive closure of each of the following relations R over {0,1,2,3} : a. R1={(0,1),(2,3)} b. R2={(0,1),(1,2)} c. R3={(0,1),(0,2),(0,3)} 1.11 If a relation R on a set A is symmetric and tra