The decarburization of carbon from a steel with an overall composition Co = 0.3wt% carbon can be expressed by the equation: Cx= Co.erf(z). If the steel is decarburized in vacuum at 1000 C for one hour, calculate the carbon concentration in steps of 0.2 mm as you go into the depth of the steel (starting with x=0 at the surface) until you reach the overall concentration of 0.3 wt % carbon. Given the diffusivity of carbon in Fe = 3 x 10-11m2 per second.