A combination lock has the following basic properties: the combination (a sequence of three numbers) is hidden; the lock can be opened by providing the combination; and the combination can be changed,...

A combination lock has the following basic properties: the combination (a sequence of three numbers) is hidden; the lock can be opened by providing the combination; and the combination can be changed, but only by someone who knows the current combination. Design a

class with public methods open and changeCombo and private data fields that store the combination. The combination should be set in the constructor.