Two water closets are roughed in at a distance of 254 millimetres (10 inches) from the completed walls. What is the c-c spacing of the sleeves if the partition is 125 mm (5 in) hollow tile and the wall finish is 19 mm (3/4 in) plaster? a) 652 mm /25 3/4in. b) 698 mm /27 1/2in. c) 335 mm /13 1/4in. d) 671 mm /26 1/2in