1.
What is the purpose of the data.table package in R, particularly in comparison to the base R data frames?

2.
In R, what does the Rcpp package primarily enable?

3.
What is the primary functionality of the shinytest package in the context of Shiny applications?

7.
What is the role of the RCurl package in R?

9.
What is the primary purpose of the shinydashboard package in R Shiny applications?