need help asap please

(a) Estimate the activation energy for creep (i.e., Qc in Equation 8.22) for the S-590 alloy having the steady-state creep behavior shown in animated Figure 8.33. Use data taken at a stress level of 300 MPa (43,500 psi) and temperatures of 650C and 730C. Assume that the stress exponent nis independent of temperature. (b) Estimate s at 600C (873 K) and 300 MPa. Part 1 What is Qc in J/mol? ? Qc i J/mol