For CompanyB.java: $7.$ Inspect CompanyB$$s one attribute: a HashMap $($employeeDatabase$)$ that maps an Employee$$s identification number $($the key$)$ to an Employee object $($the value$)8.$ Inspect the default Company constructor that initializes the employeeDatabase HashMap. $9.$ Inspect the accessor method for the employeeDatabase field $$ Try calling the getEmployeeDatabase method and storing what is returned in a HashMap to ensure you are familiar with returning references. $10.$ Inspect the populateEmployeeDatabase method to see how it works. Tip: Comment above the method with your step$-$by$-$step description of what this method does to ensure you understand it$$s entirety. $11.$ Complete the addEmployee method that accepts a name and salary as its parameters $($in that order$),$ creates a new Employee object with these values and puts the new Employee with its id in the HashMap. $($method stub provided$)$ Test Case $6$: After testing your code, submit to zyBooks to ensure it is functioning before proceeding. $12.$ Complete the increaseSalary method that accepts an int id as its parameter and increases the Employee with the matching id$$s salary by $5000.($method stub provided$)$