Please answer using Python

1.9. (a) Write a program to compute the expo nential function ex using the infinite series ex=1+x+2!x2+3!x3+ (b) Summing in the natural order, what stopping criterion should you use? (c) Test your program for x=1,5,10,15,20, and compare your results with the built-in func tion exp(x) (d) Can you use the series in this form to obtain accurate results for x