A pipe AB with a length L = 64.6 cm is welded onto the upper part of a cylindrical tank with a diameter D= 3 m.The tank is full of oil with a specific gravity SG = 0.95. The pressure is atmospheric at point A. The pressure distribution is sketched for the circular surface S (or B’C), which is the surface of interest in this problem. (a) The specific weight Yoil of this oil (2 points). (b) The vertical distance z from the surface level (point A)to the centroid of surface S (c) The area A of the surface S? (2 (d) The magnitude of the hydrostatic force (e) The moment of inertia I of the circular surface S (2 (f) The distance zo from the surface level (point A) to the center of pressure