$2.)$ One way to reduce drag on a blunt object is to install vanes that suppress the amount of flow separation near the front of the object. Vanes were installed on trucks, the drag was tested in a wind tunnel. For a truck without vanes, the drag coefficient was found to be $0\mathrm{.}78,$ while the drag coefficient dropped by $25\%$ after vanes were installed around the top and side edges at the front of the truck body. If the truck has a projected area of $8\mathrm{.}36$ square meters and is traveling at $100$ kilometers per hour, what is the reduction in drag force that results from the installation of vanes, expressed in Newtons? Assume the density of air is $\backslash (1\mathrm{.}2\backslash$mathrm$\{$~kg$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash ).(10$ points$)$