Question

we will prosecute trespassers
chnge the voice ​

Answer 1

"Trespassers will be prosecuted" = "Trespassers will be prosecuted by the owner of the land.", and now we can form the active voice: "The owner of the land will prosecute trespassers." If the active verb has no apparent subject or verb, it will be an imperative. Someone will prosecute the trespassers.

Hope it will helps ✌