C++ :: T Minus Loops - Variable Index Declaration

(while)

T minus 10 and counting
T minus 9 and counting
T minus 8 and counting
T minus 7 and counting
T minus 6 and counting
T minus 5 and counting
T minus 4 and counting
T minus 3 and counting
T minus 2 and counting
T minus 1 and counting

Declare the following index before the while loop:

int index = 10;

Correctly code a while statement below using the variable index as defined above, to produce the output shown above.

So this is what my code looks like... I also have to convert this same loop into a do while and for loop. So if I can get this one right I think the others should come relatively easy.

while (int index >= 10) {
cout << "T minus " << index;
index--;
}