A Maclaurin series for the exponential function e* is given by: x' x2 x3 x* = 1+ 2! 3! 4! Using OCTAVE/MATLAB, Write a function to calculate the factorial of a positive integer. You are NOT allowed to...

Extracted text: A Maclaurin series for the exponential function e* is given by: x' x2 x3 x* = 1+ 2! 3! 4! Using OCTAVE/MATLAB, Write a function to calculate the factorial of a positive integer. You are NOT allowed to use the in-built MATLAB function 'factorial' for this question. Name your function 'assignment'. i) ii) Using the given equation, calculate the approximate solution for x = 1 by looping from n = 1 to n = 20. Apply the function created in i) for the calculation of factorials. i) Repeat ii) for x = 2, 3, 4, 5 and 6. Store all your answers, including your answer in ii) inside a single array. Hence, plot a graph of e* against x using a blue line and blue circle markers. Label the x-axis as 'x', the y-axis as 'e*i --