Convert into an integral in cylindrical coordinates x = rcos0, y = rsine, z = Z. Answer: ") loo , of, , f(r, 0, z) azar do 0) fo of. s, f(r, o, Z ) azar de ( Small f(ro, z) azar de (F) None of the above where f(r, 0, Z) is (i) 72 cos 0 Z (ii) r cos @ sin 0 (iii) -72 cos 0 Z (iv) 2 sin2 0 Z (v) r cos 0 Z (vi) rZ (vii) None of the above The value of the integral, as a fraction in lowest terms, is