10. The natural exponential function can be expressed by un! n=0 Determine e2 by calculating the sum of the series for: n1 = 5, n2 = 15, and n3 = 25. For each sum create a vector in which the first element if O, the increment is 1 and the last term is 5, 15 or 25. Then use element-by-element operations to create a vector with the elements inally use the MATLAB built-in function SUM to add the terms of the series. Compare the values obtained with the value of e2 calculated by MATLAB