There are two parts to this question: 1) If a worker's salary increases with annual raises of 5 percent a year, what will it be in 4 years? If instead the worker gets semiannual raises of 2.5% what will his or her salary be in 4 years? 2) Explain why it would be important for a human resource professional to know how to use statistics like this in a workplace. The worker's salary is currently $5,000 a month.