Part of Parasol

7 . 1 is a front view of a part of a parasol showing the new design; 7 . 2 is a rear view thereof; 7 . 3 is a left side view thereof; 7 . 4 is a right side view thereof; 7 . 5 is a top view thereof; 7 . 6 is a bottom side view thereof; and 7 . 7 is a top, front, right side perspective view thereof. Interior portions of the part of a parasol shown in broken lines form no part of the claimed design.