Hello. You did not inform the poem to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
As your question has already shown, stressed syllables are those that sound louder and stronger than others. Therefore, the only way for you to answer this question is to read your poem aloud and understand these syllables. However, if you read this poem in a normal way, as we read any text, you may have difficulties in identifying the stressed syllables. For this reason, it is important that you read the poem aloud and slowly, so that you will be able to pay attention to the loudness of each syllable.