Write and test a function to display the values in a vector of ints, that is passed in$.$

Put all values on one line, followed by a newline at the end.

Write $($and test$)$ a function to double the values in a vector of ints, i$.$e$.$ modifying the contents of the vector, using a traditional for loop to iterate over the vector.

Use your display function to make sure you were successful

Write $($and yes again, test$)$ a function to double the values in a vector of ints, however this time using a ranged for loop to iterate over the vector.

To actually change the values our loop variable can$$t be making copies of the entries in the vector.

Instead it needs to be a reference.

Of course, again test your code using your display function.