[10] [5] 7. The graphs of f(x) = xln(x) and g(x)=sin(x) are shown below. I (0,0) y = 1 ln(1) y=sin(x) (1,0) (a) Using Integration by Parts, evaluate r In(r) dr. Show your work clearly. (b) Show that the area of the region bounded below by f(x) and above by g(x) is 4