2.442 The xedend barABCD consists of three prismatic segments, as shown in the figure. The end segments have a crosssectional area At = 34!] mm2 and length L] = 29!) mm. The middle segment has a cross~sectional area A: = 12613 mm2 and length L; = 25!] mm. Loads F5 and PI: are equal to 25.5 Hi and Ill} kN, respectively. {a} Determine the reactions RA and RD at the xed supports. {13] Determine the compressive axial force Far in the middle segment ofthe bar. 4444 PHDELEM 2.4-12