polar and parametric equations

.UMICH: Directions: Classify the curve of each polar equation. 1. r = -4sin0 2. r = 1-2cos0 3. r =6-sino 4. r = 4+3cos0 5. r = 50 6. r =3-3sino 7. r2 = 64cos 20 8. r = 2 sin 50