Executors

Here's a code snippet that creates an executor and submits two tasks to it:

ExecutorService executor = Executors.newFixedThreadPool(4);

for (int i = 1; i <= 2; i++) {
    int taskNumber = i;
    executor.submit(() -> System.out.println("Starting task-" + taskNumber));
}

TimeUnit.MILLISECONDS.sleep(50); // the current thread waits for 50 millis

executor.shutdown();

System.out.println("Main completed");

Here is an output of one execution of the program:

Main completed
Starting task-1
Starting task-2

Select one correct statement about orders of lines in the output.