Performance Appraisals, management homework help

Please respond to each of the following in 1-2 sentences :

Determine why organizations can have higher productivity when top managers encourage supervisors to set goals, assess performance, and provide feedback to employees. Support your answer with examples. Then, describe the experience you have had with performance appraisals and how your performance has been influenced by them.
Go to businessballs’ Website (http://www.businessballs.com/performanceappraisals.htm)and review the information regarding performance appraisals. Next, rate the importance of measuring performance and providing an opportunity for feedback. Support your position