Final answer:
The relative pronouns in the given sentences are 'that', 'we', 'which', and 'that'.
Step-by-step explanation:
The relative pronouns in the given sentences are 'that', 'we', 'which', and 'that'.
In the sentence, 'The study group that we are forming will meet every Tuesday at 5:00, starting this Tuesday, in the rose conference room, which is in Williams Hall right next to the lounge,' the relative pronoun 'that' introduces the subordinate clause 'that we are forming', 'we' is also a relative pronoun referring to the speaker, 'which' introduces the subordinate clause 'which is in Williams Hall', and 'that' introduces the restrictive relative clause 'that is in Williams Hall right next to the lounge'.