N- ary tree

Each node of the tree represents a real machine in a cluster. Each machine in the cluster can only communicate with its parent and child nodes through "nodeld" using the following two methods: sendAsyncRequest(toNodeId. message) and receiveRequest(fromNodeId, message) . When a request reaches a machine, the receiveRequest method of that machine will be triggered automatically. Suppose root machine (node 1 in the above tree) needs to have the ability to count and print out the total number of machines in the cluster, can you implement the node/machine class and its receiveRequest(fromNodeId, message) method to handle this case? There's no need to implement sendAsyncRequest (toNodeId, message), but you can call this method when needed.