Checkpoint: the two-branch machine

Trace this class and sequence, then return the **final** value of probe(): ``java public class Gate { private static int visits = 0; private int passes; private int blocked; public Gate() { passes = 0; blocked = 0; } public void enter(boolean ok) { visits++; if (ok) { passes++; } else { blocked++; if (blocked > 2) { passes = 0; } } } public int probe() { return passes * 10 + blocked; } } ` Calls: new Gate(), then enter(true); enter(false); enter(false); enter(false); enter(true);`.