Not able to understand what is to be done in the problem

#1

Not able to understand how we got the resultant array from the two given arrays.

#2

@balharatanvee
Consider Array1 with size=4,and array2 with size = 3

    Array1[] = { 9, 5, 4, 9 }
    Array2[] = { 2, 1, 4 }

Now starting adding from RHS,9+4=13,3 remainder 1 carry and so on,just like normal addition.
9763 will be the result if we add 9549+214.

#3

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