P1. The three-bar frame is in static equilibrium as shown. Determine: a. Internal loads on section a-a in member ABC. b. Internal loads on section b-b in member ADE. REMINDER: Express internal loads (above) in terms of a right- handed coordinate system with Normal (n) and Tangent (t) axes relative to the cross-section of interest (a-a or b-b). The z-axis is is out of the page (bending axis). 115 100 b B D 2 kN 120 mm 100 Dimensions in mm 100 100 3 kN