Question

A={i,m,n,o,p,q} B={m,n,o,r,s,t} AUB

Answer 1

A={i,m,n,o,p,q) B{m,n,o,r,s,t}
AUB={i,m,n,o,p,q,r,s,t)

Answer 2

A U B  =  { m , n , o }