Hard drives store data magnetically on metal platters

Instant messaging can pose a significant security risk

Indicate whether the statement is true or false.

For the following code, which statement is not true?

``` public class Sphere { private double radius; public double x; private double y; private double z; } ``` a. The z field is available to code written outside the Sphere class. b. The radius field is not available to code written outside the Sphere class. c. The radius, x, y, and z fields are members of the Sphere class. d. The x field is available to code that is written outside the Sphere class.