Choose the correct sentence which is built from the words and phrases given:
I / invite / some of our former classmates / we / not see / our graduation
I invite some of our former classmates we do not see since our graduation.
I am too invite some of our former classmates we have not seen since our graduation.
I also invite some of our former classmates we have not seen for our graduation.
I also invite some of our former classmates whom we have not seen since our graduation.
I also invite some of our former classmates whom we have not seen since our graduation.