can you help with the 3 questions?

Draw a diagram of Home market for a large country case. What happens to the size of terms-of-trade gain compared to deadweight loss when the Home country imposes a very large tariff? What happens to the size of terms-of-trade gain compared to deadweight loss when the Home country imposes a very small tariff? Does a large country always experience a welfare gain if it imposes a tariff? What influences whether a large country experiences a welfare gain or welfare loss