**This is from RStudio

Right now, `CS_rate` is presented as a number between 0 and 1. For plotting, it will be nice to have the proportion displayed as a number between 0 and 100. We can use `dplyr`'s `mutate()` function to add a new variable called `CS_rate_100`to the dataset that takes this desired format. Write one line of code to add this variable to the dataset and assign this to the new object `CS_data`:

Assume CS_data <- NULL