26.
Statements : Some papers are pens. All the pencils are pens.

Conclusions :
I. Some pens are pencils.
II. Some pens are papers.

27.
Statements : All the actors are girls. All the girls are beautiful.

Conclusions :
I. All the actors are beautiful.
II. Some girls are actors.

28.
Statements : All the windows are doors. No door is a wall.

Conclusions :
I. Some windows are walls.
II. No wall is a door.

29.
Statements : All cups are books. All books are shirts.

Conclusions :
I. Some cups are not shirts.
II. Some shirts are cups.

30.
Statements : Some cows are crows. Some crows are elephants.

Conclusions :
I. Some cows are elephants.
II. All crows are elephants.