3. Determine whether the binary relation is reflexive, srmmetric, antisrmmetric, and/or transitive. [12 pts.] a. The relation R on {w,x,y,z} where R= {(w,w),(w,x),(x,w),(x,x),(x,z),(y,y),(z,y),(z,z)}. b. The relation R on Z where aRb means ab1. c. The relation R on Z where aRb means a=b