I need help writing this in Python! Please make the code easy to understand! Thanks!

Provide solutions for the first 5 problems in this tutorial using a functional programming approach: 1. Implement a function product to multiply 2 numbers recursively using + and -operators only 2. Write a function flatten dict to flatten a nested dictionary by joining the keys with character. >>> flatten, d?ct(('a': 1,'b': {x: 2, 'y: 3), 'c': 4)) 3. Write a function unflatten dict to do reverse of flatten dict. 4. Write a function treemap to map a function over nested list. >>teemap(lambda x: x*x, [1, 2, [3, 4, [51lI [1,4, [9, 16, [251I1 5. Write a function tres xeverse to reverse elements of a nested-list recursively. >>tee rexerse(1, 2], [3, [4, 5]1. 6