Non-verbal communication when conveying a message

How important is non-verbal communication when conveying a message? Explain your answer. Describe 4 barriers to communication, and what you could do to minimize the effect of each one. What is sideways communication? Give an example of when you would undertake this type of communication. What is a Gantt Chart - provide a sample?What is a PERT Chart - provide a sample? Why is being able to ask questions an important workplace skill? Define the following project management terms:-a. Cost Management. Dependency. Issued. Business Case. Procurement Management.