Freely supported beam with a cross-section shown in the figure below is loaded with a force P=100 kN. Check the stress values at critical points of the dangerous section. Apply the HMH hypothesis in the calculations. Create charts of bending moments and transverse forces, as well as stress distribution along the height of the section. The permissible stresses are: \(k_r=120\ MPa, k_c=80\ MPa\).