Samir plans to attach a shelf to his bedroom wall. In order to support the heavy load that will be placed on the shelf, he’ll be fastening it to the wooden studs behind the wall using ” screws. Nut Each screw will pass through a section of the shelf that is ” thick and a ” sheet of drywall before reaching the stud. Determine, as a mixed number, how far each screw will rest in the stud?