You need to create a new billing account and then link it with an existing Google Cloud Platform project. What should you do?

Your company uses Cloud Storage to store application backup files for disaster recovery purposes. You want to follow Google's recommended practices.
Which storage option should you use?

You are deploying an application to App Engine. You want the number of instances to scale based on request rate. You need at least 3 unoccupied instances at all times. Which scaling type should you use?

Your company has a Google Cloud Platform project that uses BigQuery for data warehousing. Your data science team changes frequently and has few members. You need to allow members of this team to perform queries. You want to follow Google-recommended practices. What should you do?

Your organization uses Active Directory (AD) to manage user identities. Each user uses this identity for federated access to various on-premises systems. Your security team has adopted a policy that requires users to log into Google Cloud with their AD identity instead of their own login.
You want to follow the Google-recommended practices to implement this policy.
What should you do?