pls help to solve

A- Find the area of the region that lies inside the cardioid r = 1+ c059 and outside the circler = l in the first guadrant. B- Find the volume of the solid in the first octant bounded by the planes y + z = 4jy = x2 , 5y - plane and y; plane C- A solid has the shape of cylinder of radius a and height L Find the mass and the center of mass if the density at a point P is directly proportional to distance to the base of the cylinder