Please do the math step by step and do a correct answer for all of them. This is the 2nd time I posted this question. Please just don't copy the answer from unrelated sources and give an accurate answer.

Q.No. 38: According to the data of Robinson and Sherby (Acta Met. 17, 109, 1969), the activation energy for creep (Q.) of Tungsten was equal to that for self-diffusion value at T>2200 C while to that for dislocation pipe diffusion at T