Graph the parametric equations:

1: x = 7 sin t + sin 7t
y = 7 cos t + cos 7t

2: x = 2t
y = t + 5, -2 ≤ t ≤3

3: x = 2t - 1
y = t² + 5, -4 ≤ t ≤4

4: x = 6 sin t
y = 6 cos t, 0 ≤ t ≤ 2π