You Have Just Isolated Four Unique Sequences Through PCR Amplification

You have just isolated four unique sequences through PCR amplification of the SSU rRNA. Calculate the percent relatedness of each in comparison with the known sequence given to determine which stain(s) is most phylogenetically related.
Known: T T C G C C G G A C A T T A A G C A G T T A A C G G
Unknown #1: T T C C C C C G A C A A A A A G C A G T C A A C G G
Unknown #2: T A A G G C G G A C A T T T A G C G G T C A A C C G
Unknown #3: T A C G C C G G A C A T T A A G C G G T T A A C G G
Unknown #4: A T C G C C G C A C A A A A A G C A G T T A A C G G