Do in python and answer in 15 mins pls

Suppose you have to design a number calculation system. You need to write a recursive function that will take a 2 dimensional array / list(in python) of numbers. You need to find the summation of all the numbers of the array / list using a recursive function. Implement the following recursive function. [You can not use any loop in the code] Hint: You will need nested recursive functions. [Note for Implementation: You are not allowed to use any built-in functions except len() and print() in Python and any kind of global/class variable). def firstFunctionSum (arr, indexl, index2): #To Do return