C++ Program (need help!): Below is a C++ program along with the steps I have to complete. Will someone please help me out along with explaining and/or stating in the program where they made that change? It would really help out!

//This program demonstrates the C++ String Class #include #include using namespace std; int main() { //define three string objects str1 = "ABC"; str2 = "DEF"; str3 = str1 + str2; //display all three cout << str1 << endl; cout << str2 << endl; cout << str3 << endl; return 0; }

Step 1: Modify the given program, concatenate a string "GHI" onto str3 and display it.

Step 2: Assign string Chicago to str3. Find the length of str3 by calling member function length().

Step 3: The size function also returns the length of the string. Using a for loop to display str3 one character at a time.

Step 4: Compare str1 with str2. The result should indicate less than, greater than, or the same.