A system administrator must change the instance types of multiple running Amazon EC$2$ instances. The instances were launched with a mix of Amazon Elastic Block Store $($Amazon EBS$)$ backed Amazon Machine Images $($AMIs$)$ and instance$-$store$-$backed AMIs. Which method is a valid way to change the instance type? Stop an Amazon EBS backed instance, change its instance type, and start the instance. Stop an instance$-$store$-$backed instance, change its instance type, and start the instance. Change the instance type of an instance$-$store$-$backed instance without stopping it$.$ Change the instance type of an Amazon EBS backed instance without stopping it$.$