Static Variables Output

QualityKiosk's test-execution engine uses a Counter helper to assign IDs to generated test cases, and this is a simplified version of it along with the runner that exercises it.

class Counter {
    static int base = 10;
    int id;

    Counter() {
        base += 5;
        id = base;
    }

    static void reset() {
        base = 0;
    }
}

public class TestRunner {
    public static void main(String[] args) {
        Counter c1 = new Counter();
        Counter c2 = new Counter();
        Counter.reset();
        Counter c3 = new Counter();

        System.out.println(c1.id + " " + c2.id + " " + c3.id);
        System.out.println(Counter.base);
    }
}

Given this code with a static variable shared across multiple Counter instances, walk through exactly how you would determine what TestRunner.main prints, step by step, and give the final output.