12. SCALCETQ 103.027. For each ofthe described curves, decide ii'the curve would be more easily given by a polar equation or a Cartesian equation. Then write an equation for the curve. (a) a line through the origin that makes an angle mfg with the positive X-axis 6 (in) a vertical line through the point (3, 3) Show My Work (Optional: Q \fFor which vaHJes oft is the curve concave upward? (Enter your answer using interval notation.) Show My Work (Optional! 7. DETAiLS SCALCET910.2.075. Find the surface area generated by rotating the given curve about the yaxis. x=6f2, y=4t3, 05:51 E Show My Work (Optional