20 points) A flat bar of thickness t = 10 cm is fixed to a wall at one end and subjected to a uniaxial load P , as shown in fig. 2. Note that the bar has a 10 cm edge crack located on it. The bar is made of concrete with the following properties: ult = 3 MPa, E = 30 GPa, and Kc = 1.4 MPam. (a) Determine the maximum allowable force P that can be applied before failure for a safety factor of 2. (b) Indicate where the beam is likely to fail due to this loading