Asynchronous programming techniques & problems

You have the following code:

1) fun postRequest() {
       sendRequest { data ->
           submitRequest(data) { result ->
               confirmResult(result)
           }
       }
    }

2) suspend fun doLongComputations() {
        doSomethind()
        writeResult()
    }

3) fun postItem(item: Item) {
       preparePostAsync()
       .thenCompose { token ->
           submitPostAsync(token, item)
       }
       .thenAccept { post ->
           processPost(post)
    }

Match each code piece to the name of the approach used to work with asynchronous code.