Following experimental data are obtained from torsion test of a solid test specimen with original gauge diameter of 6,2 mm and gauge length of 104 mm: Material started to yield at a torque of 1187 kg.mm when its angle of twist is 11,3 degree. Maximum (ultimate) torque is 1280 kg.mm with corresponding angle of twist of 61,5 degree. The fracture torque is 601 kg.mm when its angle of twist is 141,4 degree. Based on the information above; Soru 18 Calculate the elastic shear strength (in kg/mm²) of the material. Soru 19 Calculate the shear strain (in mm/mm) of the material at yield point. (Use at least five decimal units) Soru 20 Calculate the modulus of rigidity (in kg/mm²) of the material. Soru 21 Calculate the ultimate shear strength (in kg/mm²) of the material. Soru 22 Calculate the shear strain (in mm/mm) of the material at point of ultimate strength. (Use at least five decimal units) Soru 23 Determine the modulus of resilience (in kg.mm/mm³) of the material. (Use at least five decimal units) Soru 24 Determine the toughness index number in torsion (in kg.mm/mm) of the material. (Use at least five decimal units)