0+lo B=-,5 C1=-(-5)=B+ LOr=s 2 U-120n=B Fyi=ka Fy =h2a 7247/24 u L u L u L u L u r r r r                 2 2 2 1 1 1 ( ) , = − − = = − − = + − + = = 1 1 1 2 2 2 F k F k Y = Y =