Instrument

FIG. 1 is a front perspective view of an instrument showing our new and ornamental design;

FIG. 2 is an alternate front perspective view thereof;

FIG. 3 is an alternate front perspective view thereof;

FIG. 4 is an alternate front perspective view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a side elevation view thereof;

FIG. 7 is a side elevation view thereof;

FIG. 8 is a top plan view thereof;

FIG. 9 is a rear elevation view thereof;

FIG. 10 is a rear perspective view thereof; and,

FIG. 11 is a bottom rear perspective view thereof.

The broken lines illustrate portions of the instrument that form no part of the claimed design.