Balanoglossus belongs to which phylum?

The phylum which was earlier considered as a sub-phylum under $Chordata$ but now placed as a separate phylum in non-chordates is:

Balanoglossus performs excretion through which of the following structures?

The phylum $Hemichordata$ is placed between which two phyla?

Which of the following is a common feature shared by Hemichordata and Chordata?

Which of the following is the excretory organ of Hemichordata?