software developer which of the following statements is correct?

Choice 1 of 5:Google can achieve a deployment frequency of more than 5000 deployments per day because they have many more employees than other organisations

.Choice 2 of 5:It is cheaper to do testing in the live (production) system as the users can help do the debugging.

Choice 3 of 5:The Minimum Viable Product (MVP) is developed just before the system is retired.

Choice 4 of 5:Deployment to production cannot always be automated as sometimes it is important that humans perform safety checks

.Choice 5 of 5:A burndown chart is used to track the amount of fire-fighting that needs to be done during testing.