1. Let T = {a, b, c, d}.
a. Find an example of a relation of this set that is transitive, but neither reflexive nor symmetric.
b. Find an example of a relation on this set that is both transitive and symmetric, but not reflexive.
a. Find an example of a relation of this set that is transitive, but neither reflexive nor symmetric.
b. Find an example of a relation on this set that is both transitive and symmetric, but not reflexive.