Please try to answer this as fast as possible correctly using R code. Thank you

Problem 4: Consider data set cars, which is available in R. It is a data frame consists of two variables speed and dist. Type ?cars to nd more information about this data set. 1. Plot a scatter plot to view the relationship between dist and speed. Put speed on the horizontal axis and dist on the vertical axis. If an observation's speed 2 15(mph), then this observation will be plotted in red color, otherwise, it will be plotted in blue color. Mimic the airquality example in lecture, update the scatter plot in part 1 such that the new scatter plot satises the stated requirements. Add a vertical line at speed 2 15(mph). This line should be dotted, and should be green. Add a legend at the bottomright corner of the plot obtained in part 3 to represent two different colors of all the observations. The captions on the legend are high and low, which need to be compatible with the plot you made before