Questions 7–15: write down the personal pronouns in each sentence. tell whether each pronoun is in the first person, second person, or third person. (reminder: possessive pronouns are personal pronouns.) 7. we decided to take our vacations together. 8. they took theirs at a later time last year, but this year they will take it earlier. 9. i took mine quite early last year, but that can be changed, too. 10. your vacation was shorter than you intended. 11. do you think it could be a little longer this year? 12. between you and me, the friends were not sure they liked it, but they agreed to take a vote anyhow. 13. we gave them paper and a pencil, and each wrote down her suggestion and gave her reason for it. 14. each friend read her own suggestion. 15. i don’t know how it happened, but they both had the same idea, and now we are going backpacking in the nearest mountains.

Personal pronouns are pronouns that refer to a person. 1st person refers to myself, 2nd person refers to you, and 3rd person is about someone else
7. We decided to take our vacations together.
We, Our, 1st person 
8. They took theirs at a later time last year, but this year they will take it earlier.
They, theirs, they, all third person
9. I took mine quite early last year, but that can be changed, too.
I, mine, 1st person
10. Your vacation was shorter than you intended.
Your, you, 2nd person
11. Do you think it could be a little longer this year?
you, 2nd person
12. Between you and me, the friends were not sure they liked it, but they agreed to take a vote anyhow.
you- second person
me- first person
they- 3rd person
13. We gave them paper and a pencil, and each wrote down her suggestion and gave her reason for it.
We- 1st person
them- 3rd person
her- 3rd person
14. Each friend read her own suggestion.
her- 3rd person
15. I don’t know how it happened, but they both had the same idea, and now we are going backpacking in the nearest mountains.
I- 1st person
they- third person
we- 1st person

Answer might be b. i think