Rewrite the following sentences, using participle or-infinitive clause

I. Rewrite the following sentences, using participle or-infinitive clause 
1. He was the last emperor who ruled both parts of the empire.
He                                                                               
2. Maxicorp were the only company which replied my letter
Maxicorp ___________________________________________
3. The equipment which belongs to the club is insured 
The equipment ______________________________________
4. The trees which were planted last week are growing well 
The trees ___________________________________________________