issue #9: Create MCQA for Array.reduce() method

[Subham5401]

Hi @kirandash ,

I have implemented the Array.reduce() method to calculate the sum of values in the given array. The code looks good and functions as expected.

Please review the changes and let me know if there are any suggestions or feedback. I'm open to making any necessary improvements. Thank you!

Changes Made:

• Implemented Array.reduce() method for summing array values.

[Subham5401]

Oops! I missed that. Thank you for bringing that to my notice. I'll do the needful.

[kirandash]

fixes #9