A sizeable number of Candidates who attempted this question could not identify the component and name the labelled parts.
The solution to the poorly answered part of the question is given below.
(a)        (i)         Starter motor
(iii)       Naming the parts labelled

V:        Earthed brushes, Brushes
W:       Armature
X:        Pole shoes
Y:        Case
Z:         Drive gear,pinion