I need help on these questions:

Find the area of the region inside the circle r= -6 cos 0 and outside the circle r = 3. The area of the region is .(Type an exact answer, using x as needed.)The intersection points of the following curves are (0,0) and 712 2 Find the area of the entire region that lies within both curves. r=7 sin 0 and r=7 cos 0 The area of the region that lies within both curves is (Type an exact answer, using x as needed.)Find the area of the region common to the circle r = 8 and the cardioid r= 8(1 - cos (). The area shared by the circle and the cardioid is (Type an exact answer, using x as needed.)