How should you enable a gce instance in project a (having project id `project-a-id`) to read files from a bucket in a project b (having project id `project-b-id`)? 1. log into cloud shell in project a and run `gcloud services enable storage. googleapis. com --project-id project-b-id`2. do not change the default service account setup and attachment3. log into cloud shell in project b and run `gcloud services enable storage. googleapis. com --project-id project-a-id`4. when launching the instance, remove the default service account so it falls back to project-level access5. log onto the instance and run `gcloud services enable storage. googleapis. com --project-id project-b-id`6. in project b, grant bucket read access to project a's default compute service account7. only one of the other options is correct