Problems 7-14, identify and graph each polar equation. 7. r = 2 + 2sin0 8. r = 4 - 2 cos 0 9. r = 1 - 2 sin 0 10. r2 = 9 cos (20) 11. r = 2 - 3 cos 0 12. r = 2 + 4 sin 0 13. r= = sin(20) 14. r = 2 cos (30)