1. The double canitlever beam shown is under a concentrated force P. Using Direct Stiffness Method; determine the deflection at point B and the reactions at supports A and C. Assume E is constant. (100 Points) 12 6L -12 6L P EI 6L 41² -6L 21² [K] = L-12 -6L 12 -6L 6L 212 -6L 41² {R}=[K]{U}-{F} (1) 31 (2) I C B L L Recall that if A= [a b [cd] then A-¹ 1 d-b = ad-bc-c a