The ornamental design for a hammock, as shown and described.
FIG. 1 is a perspective view of a hammock of the present design, the hammock illustrated being suspended, the hammock having armrests shown in a closed configuration.
FIG. 2 is a perspective view of the hammock of FIG. 1 shown with the armrests in an open configuration.
FIG. 3 is a top view of the hammock of the present design shown with the armrests in the closed configuration. The bottom view of the hammock of the present design in which the armrests are in the closed configuration is a mirror image of the top view illustrated in FIG. 3.
FIG. 4 is a top view of the hammock of the present design shown with the armrests in the open configuration. The bottom view of the hammock of the present design in which the armrests are in the open configuration is a mirror image of the top view illustrated in FIG. 4.
FIG. 5 is a front view of the hammock of the present design shown with the armrests in the closed configuration. The rear view of the hammock of the present design in which the armrests are in the closed configuration is a mirror image of the front view illustrated in FIG. 5.
FIG. 6 is a front view of the hammock of the present design shown with the armrests in the open configuration. The rear view of the hammock of the present design in which the armrests are in the open configuration is a mirror image of the front view illustrated in FIG. 6.
FIG. 7 is a left side view of the hammock of the present design shown with the armrests in the closed configuration.
FIG. 8 is a left side view of the hammock of the present design shown with the armrests in the open configuration.
FIG. 9 is a right side view of the hammock of the present design shown with the armrests in the closed configuration; and,
FIG. 10 is a right side view of the hammock of the present design shown with the armrests in the open configuration.
The dashed lines shown in the figures are for illustration only and form no part of the claimed design.