The cantilever is loaded by a pair of point forces as shown in the attached figure. The cross section of the rod is a closed circular surface. a) Solve the symbolic expression for the maximum value of the shear stress at the notch. (3 p.) b) Calculate the numerical value of the shear stress. (2 p.) Hint for part a: Stress factor for the notch. a a SA dd Txo,max Txo,nim F Q a/2 a: 0.07 m d := 0.04 m d:=0.05 m p:=0.0025 m F:=2 kN