Determine the size and shape of the design area (provide a diagram), and the pressure and flow demand at the most remote sprinkler for a system that is designed for an OH1 occupancy with a design density of 0.15 gpm over 1500 ft2 . The system is a tree system with 7 sprinklers on the branch lines on each side of the cross main. Sprinklers are spaced 10-ft apart along the branch line and branch lines are spaced 10-ft apart. The system utilizes quick response k-5.6 sprinklers under an 18-ft ceiling.