Can you explain how to solve this

What is the value of total after the following code is executed? int total = 0; int numberIn = 7; switch (numberIn) { case 3: total += 1; case 7: total += 2; case 9: total += 4; case 11: total += 5; break; default: total += 10; System.out.println (total); Answer: 11 Be sure to note that total is being incremented (not numberIn) and that the only break comes at the end of case 11