The ornamental design for a bag, as shown and described.
FIG. 1 is a front perspective view of a bag showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a close-up view of the clasp and pin mechanism shown in FIG. 1.
The broken away symbols in the drawings indicate that any portion of the article beyond what is shown forms no part of the claimed design.
The broken lines showing the chain handle and hanging metal bats are for the purposes of illustrating environment and forms no part of the claimed design. The bolder broken lines represent stitching and are part of the claimed design.