Write a function that returns a set of common elements in two sets.Prototype: def common_elements(set_1, set_2):You are not allowed to import any module

Sure! Here's a step-by-step solution in Python:

1. Define the function common_elements with two parameters set_1 and set_2.
2. Create an empty set called common_set to store the common elements.
3. Iterate over each element in set_1 using a for loop.
4. Check if the current element is also present in set_2 using the in operator.
5. If the element is found in set_2, add it to the common_set using the add() method.
6. Finally, return the common_set containing the common elements.

Here's the code:

def common_elements(set_1, set_2):
    common_set = set()
    for element in set_1:
        if element in set_2:
            common_set.add(element)
    return common_set

This function will return a set containing the common elements between set_1 and set_2.