# Question $1$: $1)$ Get a local copy of the dataset "airquality" and name it $"$df$"$ so that you can use it later. $(2)$ Next, show the first $7$ rows of it$.$ Pay attention to the names of the variables. $(3)$ Write a code that reveals how many variables and observations are in the dataset. $(4)$ Also, write a code that gives you some basic descriptive statistics. You will notice that two variables have missing values.