Exercise

Add facets to the plot

Use facet_grid() in order to add horizontal facets for 1996 and 2006 each, as detailed in the video.

Instructions

100 XP

Specify the correct formula in facet_grid() to generate two separate scatter plots with one function call.
Arrange the plots horizontally, so the year 1996 is on the left side, the year 2006 on the right side.