In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 

Trim the tree.
Cut unruly branches off the tree with a saw.

Flushing the bottom of the stringer with ground.
Draw a line parallel to the top of the last step notch, and perpendicular to the side of it (where the bottom riser will eventually go). Cut this away to make the bottom of the stringer flush with the ground. Now test the stringer by setting it in place. Cut the top and bottom of the stringer to fit, then test-fit it before cutting it out. Make sure the height is accurate. Both top and bottom points should be flush before fastening.

Sharpie dried out?

easily restore it by filling a shallow dish with rubbing alcohol and letting the tip of your marker bathe in it for a couple minutes. Put the cap back on for an hour and the marker will be good as new