Picnic Table

FIG. 1 is a top front perspective view of a picnic table, showing my new design; FIG. 2 is a front elevation view thereof, with a rear elevation view being a mirror image thereof; FIG. 3 is a left-side elevation view thereof, with a right-side elevation view being an identical image thereof; FIG. 4 is a top plan view thereof; and, FIG. 5 is a bottom plan view thereof. The evenly spaced dash-dash broken lines shown in the drawings depict portions of the picnic table that form no part of the claimed design.