In "C" programming language -

- write full code to calculate series: e = 1/0! + 1/1! + 1/2! + 1/3! + for 20 terms. A) In a recursive manner - using the factorial function. (Do not look for input from user)

B) In an iterative manner - using the 'while loop'. (Do not look for input from user)

C) Edit code to measure time for both -

i) recursive factorial function version and the

ii) iterative while loop version

(again calculating the first 20 terms of series)

D) Present timing results.