Q$4.(20$ pts$)$ Answer the following questions by considering the dc machine wingding diagram as shown in the Figure.

a$)$ Define type of armature wound and plex of the machine.

b$)$ Is the armature winding shown a progressive or retrogressive winding?

c$)$ What is the number of coils and conductors

d$)$ What is the number of parallel current paths

e$)$ What is the total number of commutator segment

f$)$ Find the commutator pitch of the machine.