Predict the header files required to run this program and its output: (i1)  (NOTE that the ASCII value of ‘A’ is 65)   using namespace std; int main() { char letter = 'A', new_letter; int value = 10, result; if(islower(letter)) new_letter = toupper(letter); else  new_letter = value + letter; result = new_letter + 10; cout<< letter <<" has changed its value to " << result <

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