Lock

FIG. 1 is a front and top perspective view of a lock, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side, elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is another perspective view thereof, shown in an environment of use.

The broken lines in the figures illustrate portions of the lock that form no part of the claimed design. The broken lines illustrating the cover in FIG. 9 depict environmental structure that form no part of the claimed design.