please answer the questions carefully and correctly

discuss the limitations of current systems, which you have experienced, and the possible reasons for these limitations. - You are required to study Figure 4: Overview of some wireless communication systems. - You are also required to review the IEEE LAN standards outlined in pages 368-371 as well as Table 8.6 ( page 364) of "Business Data Communications", sixth Edition by David A Stamper and Thomas L Case. - In addition, review the material on standards outlined on pages 4-6 of "Data Computer Communications" seventh edition by William Stallings publisher PHI. - Review a section on Regulations in Mobile Communications bv Jochen Schiller. 4G - fourth gel Figure 4: Overview of some wireless communication systems