$1$ Plotting Existing Data

The dataset airquality can be loaded by running:

library$("$datasets$")$

data$($airquality$)$

The data is daily air quality measurements from New York, from May to September of $1973.$ Load this data,

then create two line plots: one of daily Ozone measurements $($in ppb$),$ and one of daily Temperature $($in $$F$).$

Your x$-$axis should be set up to be a time axis $-$ to do this, you will need to create a time vector the same length

as the Ozone measurements, where time is calendar time: dates!

Hint: using the lubridate package may make this easier for you. You should also review Chapter $7$ of The

Book of R before beginning this TC$,$ and review the first $2-3$ workshops