kate, elizabeth and siobhan volunteer at the hospital. In a week, Katie volunteers 3 hours more than Elizabeth does and Siobhan volunteers 1 hour less than Elizabeth. Over 3 weeks, the number of hours Katies volunteers is equal to the sum of Elizabeth's and Siobhans volunteer hours in 3 weeks. Each week, each person works the same number of hours as they did week one Complete the table to find out how many hours each person volunteers each week.