The ornamental design for a cart, as shown and described.
FIG. 1 is a front perspective view of a cart, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right-side elevational view thereof, the left-side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a front perspective view thereof, illustrated in an in-use configuration with containers held by two racks of the design;
FIG. 7 is an exploded top plan view of the two racks, a cart body omitted for clarity of design;
FIG. 8 is an exploded front elevational view of the two racks, the cart body omitted for clarity of design; and,
FIG. 9 is an exploded rear elevational view of the two racks, the cart body omitted for clarity of design.
The bottom plan view forms no part of the claimed design. The broken lines showing containers in FIG. 6 illustrate environmental matter that forms no part of the claimed design. The remaining broken lines depict portions of the cart that form no part of the claimed design.