4. For the following creep rupture data for a FeCrAl alloy in pipe form, construct a Larson-Miller plot (assuming C = 20) using the experimental data 835 415 166 Hoop stress (MPa) 83 753 K 783 K 813 K 843 K 873 K 923 K 25 1x106 1x103 1x104 1x105 Rupture time (s) Use this plot to determine the expected life for a sample tested at 550C with a stress of 220 MPa