Let us consider the builder pattern where Product has four possible parts Part1, Part2, Part3, and Part4 (all integer).Assume we have three concrete builders: ConcreteBuilder1, ConcreteBuilder2, and ConcreteBuilder3.ConcreteBuilder1 assigns 11, 12, 13, and 14 to Part1, Part2, Part 3, and Part4 respectively. ConcreteBuilder2 assigns 21, 22, 23, and 24 to Part1, Part2, Part 3, and Part4 respectively. ConcreteBuilder3 assigns 31, 32, 33, and 34 to Part1, Part2, Part3, and Part4 respectively.1) Give the UML diagram.2) Implement the UML class diagram given in 1 in Java.