4. (30%) Write a function function y=nonsense (x) defined in a .m file that should return 0 if x is odd and 22 otherwise (so nonsense (4) is 16, while nonsense(11) is 0). Now test this function by using printstuff from the question above using the values [4,11,15,20] (this is part 1 of hw0104.m). Finally (this is part 2, also in hw01q4.m) create a plot for x from 0 to 50 of the function nonsense. Change the style so that the line is dashed and the points are marked with a symbol. Include a legend, a title, and the axis labels 'x' and 'nonsense'. Hint: look up mod in the MATLAB help. You will probably need a for loop to evaluate nonsense for plotting, because nonsense only operates on a single number