Write an M-file to calculate the factorial function of N!, as defined by: N!=1 N=0 N!=N*(N-1)*(N-2)*...*3*2*1 N>0 The MATLAB code to calculate N factorial for positive value of N would be n_factorial=1 for 11=1:n n_factorial=n_factorial*ii; end Be sure to handle the special case of 0! Alos, be sure to report and error if N is negative or not and integer