The ornamental design for a bag, as shown and described.
FIG. 1 is a front perspective view of a bag in a flat configuration showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is an opposite side view thereof;
FIG. 7 is an enlarged view of the claimed region in FIG. 5, shown in isolation from the remainder of the bag for the purpose of clarity; and,
FIG. 8 is an enlarged view of the claimed region in FIG. 6, shown in isolation from the remainder of the bag for the purpose of clarity.
The broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof. The unshaded regions within or adjacent to the shaded area form no part of the claimed design. The contrast in shading represents a contrast in appearance only and does not represent any particular color, material, texture or finish. The broken lines showing the remainder of the bag represent unclaimed subject matter and form no part of the claimed design.