Exercise 5.12: printAverage Write a method named printAverage
that accepts a Scanner for the console as a parameter and
repeatedly prompts the user for numbers. Once any number less
than zero is typed, the average of all non-negative numbers
typed is displayed. Display the average as a double, and do not
round it. For example, a call to your method might look like
this: Scanner console = new Scanner(System.in);
printAverage(console); The following is one example log of
execution for your method: Type a number: 7 Type a number: 4
Type a number: 16 Type a number: -4 Average was 9.0 If the first
number typed is negative, do not print an average. For example:
Type a number: -2 Contacting server and running tests... Is
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