In python method please!!!!!!!

1.Three versions of the summation function have been presented in this chapter. One uses a loop, one uses recursion, and one uses the reduce function. Discuss the costs and benefits of each version, n terms of programmer time and computational resources required. 2. Explain what happens when the following recursive function is called with the value 4 as an argument: def example(n): ifn>0: print[n example(n- 1)