The exterior wall of a small office building under construction is constructed of one fourth
in.​ paneling, five eighths
in. firecode​ sheetrock, 5 and one fourth
in.​ studs, one half
in. CDX plywood​ sheathing, 1 and three fourths
in. insulation​ board, and five eighths
in. exterior surfacing. Calculate the total thickness of the wall