Write a function per2 that receives one number as an input argument. The function has a persistent variable that sums the values passed to it. Here are the first two times the function is called:

per2.m

function outstat = per2(num)

% Persistent variable sums the numbers

% passed to this function

% Format of call: per2(input number)

% Returns the persistent sum of input arguments

persistent mysum

if isempty(mysum)

 mysum = 0;

end

mysum = mysum + num;

outstat = mysum;

end