Java, i need it within 4 hours.

1-  (Employee Class) Create a class called Employee that includes three instance 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 instance variable. If the monthly salary is not positive, do not set its value. Write a test app named EmployeeTest 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.

2- 

•  (Sales Commission Calculator) A large company pays its salespeople on a commission basis. The salespeople receive $200 per week plus 9% of their gross sales for that week. For example, salesperson who sells $5,000 worth of merchandise in a week receives $200 plus 9% of $5000, or total of $650. You’ve been supplied with a list of the items sold by each salesperson. The values of these items are as follows:
• Item Value
• 1 239.99
• 2 129.75
• 3 99.95
• 4 350.89
• Develop a Java application that inputs one salesperson’s items sold for last week and calculates and displays that salesperson’s earnings. There’s no limit to the number of items that can be sold.