Below is the y-z cross-section of a rectangular bar with thickness, 2t, width w, andlength L (in the x-direction, which points out of the paper, but not shown in thefigure). The bar is placed at a temperature T above the stress-free temperature andis subjected to a mechanical load in the x-direction (not shown in the figure). Thetotal strain measured along the x-direction is.The edges at z=t are placed0between two rigid walls. The bar has Young's modulus, E, Poisson's ratio, , andcoefficient of thermal expansion, . Determine all the normal stress component