(7) The alloy CoCr is an important titanium alloy used in the aerospace propulsion. An important consideration in propulsion is the diffusivity of chromium in this alloy over time, it can diffuse and form its own crystal structure, which significantly weakens its mechanical performance. The plot below shows how the diffusivity of chromium varies with temperature. NASA engineers are interested in employing it in a rocket engine where temperature can get as high 2278C. The alloy has not been tested at such high temperature and the engineers would like to predict how fast the chromium forms the second crystal structure. To do so, they must know the activation energy (Q,J/mol) and diffusion constant (D0,m2/s). (a) Use the plot to determine these values and then (b) calculate what the diffusivity of aluminum would be at 2278C. (20 points). niffuciuitw nf Cr in CnCr