Bag

1. 1The ornamental design for a bag as shown and described.

FIG. 1 is a front view of a bag showing our new design;
FIG. 2 is a front view thereof with the hanging logo omitted;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a front view of an alternative embodiment of our new bag design, corresponding to the design of FIGS. 1-6 shown in a line drawing convention;
FIG. 8 is a front view thereof with the hanging logo omitted;
FIG. 9 is a rear view thereof;
FIG. 10 is a right side view thereof;
FIG. 11 is a left side view thereof;
FIG. 12 is a bottom view thereof;
FIG. 13 is a front view of an alternative embodiment of our new bag design, corresponding to the design of FIGS. 7-12 and shown with shading;
FIG. 14 is a front view thereof with the hanging logo omitted;
FIG. 15 is a rear view thereof;
FIG. 16 is a right side view thereof;
FIG. 17 is a left side view thereof; and,
FIG. 18 is a bottom view thereof.
The broken lines depict portions of the bag that form no part of the claimed design.