need help with this multivariable calculus problem!

4. A metal plate is lying in the region bounded between the circles x2 + y? = 1 and x2 + y2 = 4 and between the lines y = x and x = 0 (sec diagram to the right). The plate has a density of o(x, y) = 12y grams per cm, where a and y are measured in cm. Use polar coordinates to set up an iterated integral that gives the mass of the metal plate. Then, evaluate the integral by hand to find the mass of the plate, and show your work. Please circle your final answer, and include the correct units