What are some use cases for Amazon Simple Notification Service $($Amazon SNS$)?($Select THREE.$)$ Notify multiple systems that user input is ready for processing. Gather streaming data from multiple systems. Send a text message to systems operators when unusual activity has been detected. Send a push notification to mobile applications when a new software update is available. Hold input until it can be processed in the order that it's received. Trigger a single AWS Lambda function when an object is created in an Amazon S$3$ bucket.