How do you play someone like you on tonic sol-fa?

To play "Someone Like You" using tonic sol-fa, you would first identify the key of the song and the corresponding solfège syllables for the melody. The tonic (do) represents the root note, while other syllables like re, mi, fa, sol, la, and ti correspond to the other notes. You can transcribe the melody into its solfège representation by mapping the notes to their respective syllables. Practice singing or playing the melody using these syllables for a more intuitive grasp of the song.