Solution:All classes are diamonds.

No diamond is store.
A+ E E-type of Conclusion
"No class is store". (P)
All rooms are classes.

No class is store.
A + EE-type of Conclusion.
"No room is store".(Q)
All rooms are classes.

All classes are diamonds.
A+ A A-type of Conclusion
"All rooms are diamonds". (R)
No store is room.

All rooms are classes.
E+A O₁-type of Conclusion.
"Some classes are no stores". (S)
Conclusion (R) is the Conclusion I.
Conclusion II is Converse the first Premise.