Assume that you have the following function and that it has not yet been called

Assume that you have the following function and that it has not yet been called.

strfunc.m

function strfunc(instr)

persistent mystr

if isempty(mystr)

 mystr = '';

end

mystr = strcat(instr,mystr);

fprintf('The string is %s\n',mystr)

end

What would be the result of the following sequential expressions?