Performance and optimization assessment is important to identify performance degradation and bottleneck within a network. Recognizing the element to be measured may help to increase network performance. (a) Currently, you are having a problem with your network performance. As a network engineer, you are required to investigate the problem. By referring to the proper FCAPS model, discuss the strategy that can be used to assess the performance of the network. Give FOUR (4) appropriate metrics that can be used to help you in assessing network performance. (10 marks) (b) Give FOUR (4) suggestions on the importance of flow analysis which can help in analyzing the network's performance. Give one tool to support your answer to each suggestion. Provide a different tool for each suggestion. (8 marks)