Big data are data that exist in very large volumes and many different varieties $($data types$)$ and that need to be processed at a very high velocity$($speed$).$ Not surprisingly, big data analytics refers to analytics that deals with big data.

a$)$ explain what is meant by data lake in the context of big data characteristics.

b$)$ identify three vs of big data known as volume, variety as well as velocity. support your explaination by giving relative examples