Complete the C$++$ code

The C$++$ code will ask the user to enter a day from the keyboard and save it in variable new$\_$day.

Then, the program will concatenate the entered day, new$\_$day, with the given string day. Save the concatenated word in a new variable.

After it$,$ the program will find the index of the word on$,$ and then use this index to insert the word MY DAY.

At the end, the program will print the length of the concatenated day and the sixth letter of the concatenated day. The print message should be as:

The concatenated days is $\_\_\_\_\_\_,$ with length of $\_\_\_\_$ with letter $\_\_\_$ as the sixth letter.

Given:

string day $=$ "Monday", new$\_$day;