Determine the stress intensity factor for the edge-cracked beam shown below when subjected to a moment of 400 ft-kips. If the beam was made from an extremely tough steel that has a yield strength of 195 ksi and a K. of 160 ksi Vin. and the moment applied to the beam was increased to 1600 ft-kips, would this beam fail? 4 in. M 1ft 0lin.