How to solve this

(82.) Define H =zE C:y>0} H ={z eC:y<0} L' ={ze C:x>0} L ze C:x<0} z The function f(z) = _ 1. Maps H onto H and H onto H 2. Maps H Onto H and H onto H* 3. Maps H onto L and H onto L 4. Maps H Onto L and H onto L 3z +1