Translate the propositions of the following sorites into standard form, and test the validity of each sorites.

(1) No interesting poems are unpopular among people of real taste.
(2) No modern poetry is free from affectation.
(3) All your poems are on the subject of soap bubbles.
(4) No affected poetry is popular among people of real taste.
(5) Only a modern poem would be on the subject of soap bubbles.
Therefore all your poems are uninteresting.