Adjustable ladder

FIG. 1 is a front view of an adjustable ladder;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a bottom side view thereof;

FIG. 6 is a top side view thereof;

FIG. 7 is a extend view thereof;

FIG. 8 is an enlarged view of FIG. 5 ; and,

FIG. 9 is an enlarged view of FIG. 6 .

The broken lines are for the purposes of illustrating portions of the adjustable ladder and form no part of the claimed design.