guyz plzzz help!!!!!!

Answer:
Step-by-step explanation:
e) as given
a^p=b ------1
Taking power 'q' on both side (1) we get
a^pq=b^q
a^pq= c - - 2 (since b^q=c)
Now taking power 'r' on both side of equation 2
a^pqr=c^r
a^pqr=a (since c^r=a)
So we get
pqr=1 (answer)