21 is quinto
22 is tercer libro
23 is segunda
24 is Pedro es el hijo séptimo
25 is nuevo
Comelo is in the yo form meaning I not you
1) sabe
2)conozco
3)sabemos
4)sabe
5)conocemos
Also, I swear all Spanish teachers at the beginning of the year be like “don’t worry about vosotros we will not be learning about that” and it be the first thing they give you, but I hope this helps ;)