Find the mass of a plate occupying the region R, where R is the region bounded by the graphs of y = sin(3m), y = O, a: = O and a: = arr/3 having the mass density (1(a), y) = 4y kglm2. (6 points) Your answer should include: a) Sketch of the shaded region, R, in 2D. Include the equation of the curve. Show your work. b) The integral with appropriate limits 0) Evaluation of the integral