The x y$-$coordinate plane is given. A curve and $5$ rectangles are graphed. The curve f$($x$)$ enters the viewing window on the y$-$axis, goes down and right becoming less steep. The x$-$axis from x $=0$ to x $=10$ is divided into $5$ subregions, each of which becomes the base of a rectangle with width $2.$ The curve intersects the top right of each rectangle at the following points. $(2,3)(4,1\mathrm{.}8)(6,1\mathrm{.}1)(8,0\mathrm{.}7)(10,0\mathrm{.}4)$