(ii)

Let G be a finite group and k a field of characteristic p> 0. P. Symonds [4] determined the comoposition factors of the cohomology as a cohomological Mackey functor for G. We consider more deteiled structure of H∗(−, k). First, we recall the definition of the Mackey functor for G. Definition A cohomological Mackey functor M for G is the following specification. • k-vector space M(H) for H ≤ G. • k-linear ma