@Kate Heskett - I would try this:
Create a Task Report with the following data columns:
Task Name Actual Hours Iteration: Name Add some attributes: Sum Actual Hours Group by Iteration Name Report Options - Prompts: Assigned to Name Actual Completion Date Chart - however you'd like. Pie can be challenging. For my example, I'm using a column chart, since I chose a wide time range to demo, covering multiple iterations. You'll have to duplicate this report and change the chart criteria, potentially (one for hours, one for # of tasks in/out of an iteration). Screenshots attached... is this what you're going for?
Greg Troester CHG Healthcare Services, Inc.