A pressure cylinder head is held to the pressure cylinder by a pattern of 8 cap screws. The maximum pressure in the cylinder exerts a total gas force of 67 858.4. The screws are 12 mm and assume the screws have a proof strength of 600 MPa. The initial tightening force is specified to be 75% of the screw-proof load. The screw and clamped material stiffness are calculated to be 744 MN/mm and 1960 MN/mm. Determine: (a) Initial tension in each screw in N (b) External load per bolt in N if divided equally (c) Bolt force in N (d) Proof load in N (e) The external load per bolt that leads to the bolt load becoming equal to the proof load (I called it F*e) in (f) Load factor