Use the Force Method and solve the following 1-degree indeterminate structure by considering the vertical reaction at the spring (RB) as the extra unknown. For deflection calculations use only the Virtual Work-Graphical method. lo KN B # ET RB= 5 kN Rg=4.36 kN RB-3.09 KN Rg=6.86 kN 2.5 El 2.5 K=2EI