Java.lang Class - General Questions

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(Character.isLetter('x') + " " + Character.toLowerCase('M'));
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(Math.pow(2, 5));
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(Math.ceil(4.1) + " " + Math.floor(4.9));
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(Math.round(2.5) + " " + Math.round(-2.5));
    }
}

What is the output of the following program?

public class Main {
    public static void main(String[] args) {
        System.out.println(Double.compare(1.5, 2.5));
    }
}