Given two polynomials represented by two arrays that contains the coefficients of poynomials, returns the polynomial in form of array formed after multiplication of given polynomials.

Example 1:

Input:
M = 4, N = 3
Arr1 = {1 , 0, 3, 2}
Arr2 = {2, 0, 4}
Output: {2, 0, 10, 4, 12, 8}
Explaination: 
First polynomial: 
1 + 0x¹ + 3x² + 2x³
Second polynomial: 
2 + 0x¹ + 4x²
Product polynomial:
2 + 0x¹ + 10x² + 4x³ + 12x⁴ + 8x⁵

Example 2:

Input:
M = 5, N = 4
Arr1 = {1, 9, 3, 4, 7}
Arr1 = {4, 0, 2, 5}
Output: {4, 36, 14, 39, 79, 23, 34, 35}
Explaination: 
First polynomial: 
1 + 9x¹ + 3x² + 4x³+ 7x⁴
Second polynomial: 
4 + 0x¹ + 2x²+ 5x³
Product polynomial:
4 + 36x¹ + 14x² + 39x³ + 79x⁴ + 23x⁵+ 34x⁶ + 35x⁷

Your Task:
You don't need to read input or print anything. Your task is to complete the function polyMultiply() which takes the array Arr1[] and Arr2[]and their size M and N as input parameters and returns the polynomial in form of array formed after multiplication of given polynomials..

Expected Time Complexity: O(M*N)
Expected Auxiliary Space: O(M+N)

Constraints:
1 ≤ M, N ≤ 100
1 ≤ Arr1[i] , Arr2[i] ≤ 100