Look at the following text:
Exercise initiatives improve employee performance
Employee health can be improved with 30 minutes of walking per day. Research shows that 30 minutes of walking lowers a person's risk of health issues.
Problem: Unfit employees do not perform well
Employees who do not exercise are at risk for health issues such as heart disease. They are also more likely to feel tired throughout the workday and experience a decrease in productivity.
a. Why is this text not clear?

b. Show how you would change this text to make it more readable.