The ornamental design for a bag, as shown and described.
FIG. 1 is a right side perspective view of a first embodiment of a design for a bag;
FIG. 2 is a front view of the first embodiment of the design for the bag;
FIG. 3 is a detail view of the pattern from the section indicated in FIG. 2;
FIG. 4 is a back view of the first embodiment of the design for the bag and also a back view of the second embodiment of a design for a bag;
FIG. 5 a left side view of the first embodiment of the design for the bag;
FIG. 6 is a top view of the first embodiment of the design for the bag;
FIG. 7 is a bottom view of the first embodiment of the design for the bag and also a bottom view of the second embodiment of the design for a bag;
FIG. 8 is a detail view of the pattern from the section indicated in FIG. 5;
FIG. 9 is a right side perspective view of the second embodiment of the design for the bag;
FIG. 10 a left side view of the second embodiment of the design for the bag; and,
FIG. 11 is a top view of the second embodiment of the design for a bag.
It should be understood that the pattern of FIG. 3 is continuous on the surfaces of the individual sections of the bag on which it is depicted in FIGS. 1 and 2 and the pattern of FIG. 3 is not found elsewhere on the first embodiment of a design for a bag. The pattern depicted in FIG. 8 is fragmentarily shown in FIGS. 1, 5, and 6 for convenience of illustration. It should be understood that the pattern of FIG. 8 is continuous on the surfaces of the individual sections of the bag on which it is depicted in FIGS. 1, 5, and 6, and the pattern of FIG. 8 is not found elsewhere on the first embodiment of a design for a bag.