In Java why do we typically declare instance variables of a class as private and instance methods as public?

Define what an instance variable and class variables are and explain what the differences between them is

Write a static method removeDuplicates(Character[] in) that returns a new array of the characters in the given array, but without any duplicate characters. Always keep the first copy of the character and remove the subsequent ones. For example, if in contains b, d, a, b, f, a, g, a, a, f, the method should return an array b, d, b, f, g.

Consider the implementation of class Clock on the last page. a. (5 pts) Identify all the occurrences of constructors, instance variables, mutators, and accessors. b. (10 pts) Implement the toString and equals methods. c. (20 pts) Create a main method that creates objects for each constructor and calls all methods in the class (including the toString an equals methods). You can split the method calls between objects (i.e. you dont have to call all methods for each object). d. (10 pts) What is wrong with the following statements, assuming they appear in a valid main program? Clock clock = new Clock(10,59); // set clock clock.hour = clock.hour + 1 // increment hour by one