Active/Passive infinitives

The man wants to walk

(a)  

The dogs are seen to sleep

(a)  

The sheep is not able to be found

(a)  

The wall is not seen to be built

(a)  

The bird wants for that human to sing

(a)  

The wolf thinks the sheep to be alone

(a)  

Translate: Mercator vendit saccum ornamentorum Iuliō

Inimicus vult exspectare Romanum, sed non potest pulsare eum.

What are the singular active, plural active, singular passive, and plural passive forms of "monet"?

(a)  

What are the singular and plural active forms of "he wants"

(a)