The antecedent would be their. Our doesn't fit because it refers to the whole group. My just doesn't fit at all and neither does his. So it would be Their. :)
It's a plural verb.
hope that helps you out.
A) Epistrophe and C) Assonance.
It is an epistrophe because it repeats “in common”.
It is an assonance because it repeats the vowel “o” and “a”.
Explanation:
5. joyful and entertaining
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>you</em><em> </em>