A string can a set of characters represented by a row vector of characters. If s1='John Carter', s2='a manager', write a command to use s1 and s2 to concatenate to a new string s='John Carter is a manager'.
s=s1, 'is', s2
s=['s1', 'is', 's2']
s=[s1, is, s2]
s=[s1, 'is', s2]