1- Write a class declaration for Shape class and add the two variables to the class declaration sides: is an int variable that holds the number of sides the shape has. angles:  is an int variable that holds the number of angles the shape has.  2- The class should have the following constructors: A constructor that accepts the following value as argument and assigns it to the appropriate fields: sides and angles. A no-arg constructor that assigns 0 to the sides, and 0 to the angles field. 3- Write mutator methods that store values in these fields and accessor methods that return the values in these fields as in above UML diagram. 4- Once you have written the class, write a separate program that creates two Shape objects to hold the following data:

1. Write a class named Coin. The Coin class should have the following field: • A String named sideUp. The sideUp field will hold either "heads" or "tails" indicating the side of the coin that is facing up. The Coin class should have the following methods: • A no-arg constructor that randomly determines the side of the coin that is facing up ("heads" or "tails") and initializes the sideUp field accordingly. • A void method named toss that simulates the tossing of the coin. When the toss method is called, it randomly determines the side of the coin that is facing up ("heads" or "tails") and sets the sideUp field accordingly. • A method named getSide Up that returns the value of the side Up field. Write a program that demonstrates the Coin class. The program should create an instance of the class and display the side that is initially facing up. Then, use a loop to toss the coin 20 times. Each time the coin is tossed, display the side that is facing up. The program should keep count of…

Java:

1. RetailItem Class Write a class named Retailltem that holds data about an item in a retail store. The class should have the following fields: • description. It is a String object that holds a brief description of the item. • unitsOnHand. It is an int variable that holds the number of units currently in inventory. • price. It is a double that holds the item's retail price. Write appropriate mutator methods that store values in these fields and accessor methods that return the values in these fields. Once you have written the class, write a separate program that creates three RetailItem objects and stores the following data in them. Units On Hold Description Designer Jeans Jacket Price 40 34.95 12 59.95 Shirt 20 24.95