4. Solve for the axial stresses of members BD, DE, & FG of the truss in example 3. Indicate whether it is tensile or compressive stress.

: Consider the truss shown in the figure below, and answer the following questions. Figure is not to scale. P P R K 5 m B C D E F - 2 m --2 m - 2 m - 2 m- 2 m-- 2 m - a) If P and R are non-zero forces and Q = 0 kN, indicate all the zero-force members in the truss. O LB O LC O KC O KD O JD O ID O IE О НЕ О НЕ O None b) Following from the situation described in Part (a), how many additional zero-force members will there be in the truss in the following situation? If the force R acting at node H is removed.