Write 'v.t.' at the end of the sentence if the verb transitive, and 'v.i' if the verb is intransitive

EXERCISE 1: Write 'v.t.' at the end of the sentence if the verb
transitive, and 'v.i' if the verb is intransitive. Change the sentences
the passive if possible.
1. The old man died peacefully. (v.i)
(No change)
2. A farmer invented this machine. (v.t.)
This machine was invented by a farmer.
3. We usually agree with cach other.