Identify Z in the following reaction:

Identify Y+Z in the following reaction

Identify E in the following reactions:

Identify (Z) int eh following reaction series : Etahanol overset(PCl_(5))(rarr)(X)overset("Alc. KOH")(rarr)(Y) underset(H_(2)O,"heat") overset(H_(2)SO_(4),"r o om temp.)(rarr)(Z)

Identify (Z) in the following series,