Cohomology of algebras of semidihedral type, III: the family $SD(3\mathcal K)$

The present paper continues the cycle of papers of the author (some among them – in collaboration), in which the Yoneda algebras are calculated for several families of algebras of dihedral and semidihedral type (in K. Erdmann's classification). In the paper, the Yoneda algebras are described (in terms of quivers with relations) for algebras of semidihedral type that form the family $SD(3\mathcal K)$.