I need help on these 2 math problems:

1.

Consider a pair of polar equations r = 18 sin 0, r = 9 csc 0. Choose the correct graph. O NA O r = a sin 0 r = b csc e r = a sin e 0 r = b csc 0 O NA O 371 r = b csce r = a sin e r = a sin 0Find the polar coordinates of the point(s] of intersection. (Use symbolic notation and fractions where needed. Give your answer as of a commaseparated list of point coordinates in the form (a, s0.) The base of a solid is enclosed by the graphs of y : and y : xz; slices made perpendicular to the base along the xaxis have cross sections that are triangles whose base is the distance between the graphs and whose height is 8 times the length of the base. Find the volume of the solid. {Express numbers in exact form. Use symbolic notation and fractions where needed.)