31-34 please help please... this is just our review... no need for solution please. answer directly only.... please... IN RETURN I WILL GIVE HELPFUL RATING DIRECTLY...

31. Evaluate the integral of cos$ 3A dA from 0 to It /6. A. 351/768 C. 271/363 B. 231/765 D. 121/81 32. Evaluate the integral of (3x2 + 9y2 )dx dy if the interior limit has an upper limit of y and a lower limit of 0, and whose outer limit has an upper limit of 2 and lower limit of 0. A. 10 C. 30 B. 40 D. 20 33. Evaluate S, So (x2 + y? )dxdy . A. 35/2 C. 17/2 B. 19/2 D. 37/2 34. Evaluate the double integral of r sin u dr du, the limit of r is from 0 to cos u and the limit of u is from 0 to pi. A. -1/6 C. 1/3 B. 1/6 D. 1/2