1. (a) A class Scanner in Java can be used to get user input and its methods can be used after the following statement is executed:

    Scanner input = new Scanner(System.in); 

   One of its methods nextDouble() returns the next double value from the keyboard. Now you are requested to write a method enterHeight() which displays the message "Input height: " and uses the method input.nextDouble() to get the user input. The process should be repeated until the input is non-negative. Finally the input should be returned. You can assume the aforementioned statement starting with Scanner has already been executed.

2. (b) Write a method category(double height) which returns a suitable type in string form according to the following:

Condition Type height >= 200 Tall

100 <= height < 200 Medium height < 100 Short