Answer:
    public static boolean is_weekend(List week){
        if(week.contains("Saturday")||week.contains("Sunday"))
        {
            System.out.println("List has a weekend");
            return true;
        }
        else{
            System.out.println("List has no weekend");
            return false;
        }
    }
Explanation:
- Using java programming language
 - Import <em>java.util.ArrayList</em> and <em>import java.util.List;</em> so you can implement a java list
 - Create a list and add the days of the week
 - Create the required method using the contains() method to check for Sunday and Saturday and return true if the list contains them
 - See the complete program with a call to the method
 
<em>import java.util.ArrayList;</em>
<em>import java.util.List;</em>
<em>public class Car {</em>
<em>    public static void main(String[] args) {</em>
<em>        List<String> daysOfWeek = new ArrayList<>();</em>
<em>        daysOfWeek.add("Sunday");</em>
<em>        daysOfWeek.add("Moday");</em>
<em>        daysOfWeek.add("Tuesday");</em>
<em>        daysOfWeek.add("Wednesday");</em>
<em>        daysOfWeek.add("Thursday");</em>
<em>        daysOfWeek.add("Friday");</em>
<em>        daysOfWeek.add("Saturday");</em>
<em>        is_weekend(daysOfWeek);</em>
<em>    }</em>
<em>    public static boolean is_weekend(List week){</em>
<em>        if(week.contains("Saturday")||week.contains("Sunday"))</em>
<em>        {</em>
<em>            System.out.println("List has a weekend");</em>
<em>            return true;</em>
<em>        }</em>
<em>        else{</em>
<em>            System.out.println("List has no weekend");</em>
<em>            return false;</em>
<em>        }</em>
<em>    }</em>
}