1. Assuming that subject collection element appears only a, b, c, d, e, f, g, h, etc. 8 characters, write programs to complete any two sets X and Y poor fill \ and \ \ \ poor symmetry operations,


2. Set the set A={x, y, z, u, v, w}; R, S is on A relationship, write programs to complete said the inverse operation of o relationship \ \ figure said, compound operation, power operation


3. Set the set A={x, y, z, u, v, w}; R, S is on A relationship, write programs to complete judgment relations of the following properties: reflexivity \ the reflexivity, symmetry, antisymmetry and transitivity