write a java code programing

Question 1: Employee Class(50 Points) Create a class called Employee that includes three variables a first name (type String), a last name (type String) and a monthly salary (double). Provide a constructor that initializes the three instance variables. Provide a set and a get method for each variable. If the monthly salary is not positive, do not set its value. Write a test program named Employee Test that demonstrates class Employee's capabilities. Create two Employee objects and display each object's yearly salary. Then give each Employee a 10% raise and display each Employee's yearly salary again. Draw the UML diagram for the class. (It's not mandatory.)