Its starts out as

def addBinary (first, second):

Part IV: Binary Addition (10 points righn-so-le, idding uee of digits at a tme, annnding to the Solowing run 0+0- 2+1-, plosybit of 1 foe the sext coln 110 in birary) If yont have thre ls to add (2 +1, pse a carry bit of 1), the a, with a cnery bet of 1 (1 +1 +1-3:311 in bnary) 101; 1011 soll 1011 1011 011 3001 111011101 o t13001100110 MacBook Air