I don't know how to start

Problem 1: Roof and floor framing plans are shown on the following sheet for a 3-story building. The building is 80 feet square in plan and has 15-foot story heights for an overall height of 30 feet. 45 feet The roof loads are: 20 psf dead and 30 psf live The floor loads are: 80 psf dead and 80 psf live Find the max moments in a roof truss and members RBI, FB1, FB2, FB3, FB4 and FB5 in the plans below. Find the story-by-story loads in columns C1 and C2 20' 20 20' Zo' CI H H -H FB2 30 30' .ca H FBS STEEL TRUSTED @ 5 0.5 20 20 30' 30' - H -FI H . ROOF FRAMING PLAN 2 NR FLOOR FRAMING PLAN