Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit? 
Definitions:
Turnover
The rate at which employees leave a workforce and are replaced.
Strategic HRM
A proactive approach in human resources management that aligns HR practices with the strategic objectives of an organization to achieve long-term goals.
Senior Manager Team
A group of high-level executives who are responsible for making strategic decisions within an organization.
Recruiting Quality Candidates
The process of identifying, attracting, and selecting highly skilled and suitable individuals to fill job roles within an organization.
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