10- Find all points of inflection of f(x) = 2x(x-4)5. 20 Find the area of the region bounded by the graphs of flee ) = ksell and elv) = 1$5 from *= 1 to X= 4. Show all work. 30 Find the antiderivative for each of the following : a ) . s ? th dy K + 2 b) : Sex cos ( ex) dre